Spring, sSummer, fFall or wWinter; wWhat is your favorite season?

Just make sure to capitalize the seasons names and the start of a sentence

I can enjoy wWinter sports, and there are a lot of events like cChristmas and new tyear holiday.

Spring, sSummer, fFall or wWinter; wWhat iIs yYour fFavorite sSeason

For a title, it is either you write every thing in the capital letter or begin the letter of every major words with a capital letter except prepositions (with/on), conjunctions(and/or) and articles (a/an/the)

I can enjoy winter sports, and there are a lot of events like cChristmas and new tyear holiday.

Christmas is a proper noun and proper nouns start with the capital letter.

Spring, summer, fall or winter;: what is your favorite season?

Don't forget the punctuation!

I can enjoy winter sports, and t. There are a lot of events during the holidays like cChristmas and nNew tYear holidays.

Its not typical to say "New Year holiday" just "New Years". So to introduce the different winter holidays I put 'holidays' before the specific ones. Be sure to capitalize them.

Also, tThe most important thing is lessfewer insects!

Fewer is a more natural word to use here instead of "less." You could start the sentence with "also" but its better writing to do without.