So, there was more than 3 millions whales who were be killed. So, there was more than 3 million whales who were killed.

No need for s at the end of a million unless there is no number of millions given like "3 million" and "Millions of whales". Were is already past tense so be is useless

So, there was more than 3 millions whales who were bere killed. So, more than 3 millions whales were killed.

So, there was more thanover 3 millions whales who were being killed a year. So, over 3 millions whales were being killed a year.

But, the whales becamed popular for the specific song they make. But the whales became popular for the specific song they make.

Again, became is already past tense so d is useless

But, the whales becamed popular for the specific song they makesing. But, the whales becamed popular for the specific song they sing.

But, the whales becamed popular for the specific songund they make. when (yada yada yada) But, whales became popular for the specific sound they make when (yada yada yada)

"But, whales became popular for the specific sound they make when they go up to the surface of the water for air" for example.

The wWhales Whales

The wWhales Whales

The whales are called the kKings oOf tThe IOcean because of their height. The whales are called the Kings Of The Ocean because of their height.

Wales is a country of the UK, but whales are the animal you are referring to. Kings Of The Ocean is a title, so it should be capitalised

The wWhales are called the kings of the Iocean because of their heightsize. Whales are called the kings of the ocean because of their size.

The wWales are called the kings of the Iocean because of their heightsize. Wales are called the kings of the ocean because of their size.

The blue whale can grow up until 30 metters (it's so big). The blue whale can grow up until 30 meters (it's so big).

Wrong spelling of meters

The blue whale can grow up until 30 mettersres (it's so big). The blue whale can grow up until 30 metres (it's so big).

TheA blue whale can grow up untilto be 30 metters long (it's sovery big). A blue whale can grow to be 30 meters long (it's very big).

But they hare hunted for their oil and meat. But they are hunted for their oil and meat.

Not hare, are.

But they hare hunted for their oil and meat. But they are hunted for their oil and meat.

But they hare hunted for their oil and meat. But they are hunted for their oil and meat.

In the 1800's it wasn't a problem because they were hunting whales with wooden boats, which movesd slowly, and the whales canould move until 30 km per hours. In the 1800's it wasn't a problem because they were hunting whales with wooden boats, which moved slowly, and the whales could move 30 km per hour.

We are talking about all whales, so whales. Since we are talking about the 1800s, it should be in the past tense moved. Can is used for all whales, and could is used for some, so could is more suitable. The until is redundant meaning useless.

In the 1800's, it wasn't a problem because they were hunting whale withs in wooden boats which moves slowly and the whales can move untilp to 30 km per hours. In the 1800's, it wasn't a problem because they were hunting whales in wooden boats which move slowly and whales can move up to 30 km per hours.

In the 1800's, it wasn't a problem because they were hunting whales with wooden boats which movesd slowly and the whale can move until, while whales were much faster - they can swim as fast as 30 km per hours. In the 1800's, it wasn't a problem because they were hunting whales with wooden boats which moved slowly, while whales were much faster - they can swim as fast as 30 km per hours.

But, in the 1900's, a man invented a new weapon: the exploding weapon. But, in the 1900's, a man invented a new weapon: the exploding weapon.

An engine?

And with the advances in technology, the boats becamed faster. And with the advances in technology, the boats became faster.

Became is already past tense so the d at the end is useless

And with the advances in technology, the boats becamed faster. And with advances in technology, the boats became faster.

Different associations like Green Ppeace created reforms to save them and it allowed to save a lot of whale species. Different associations like Greenpeace created reforms to save them and it allowed to save a lot of whale species.

Greenpeace should be together

Different associations like Green Peace created reforms to save them and it allowed us to save a lot of whale specispecies of whales. Different associations like Green Peace created reforms to save them and it allowed us to save a lot of species of whales.

Different associations like Green Peace created reforms to save them and ithat allowed to savefor the preservation of a lot of whale species. Different associations like Green Peace created reforms to save them and that allowed for the preservation of a lot of whale species.

Different associations like Green Peace and _________. Not really an important error - many natives tend to list only one example after saying "Different associations" or "Associations such as". These phrases ask for at least one more example if you've govem one already, but this is often ignored (and no one really cares to be honest)