Recent studies on animal and human behavior canhave challenged common assumptions we made about the reasonsing behind certain actions towards others.

According to the most spread conception,widely held belief, while selfishness behavior is characterized by the search for individual gains, altruism consists inof sacrificing one's own interest for the good of others.

Being tTwo examples of this are the meerkat sentinel that be in, which stands guard while the other meerkats look for food, or the person that donates one of his kidneys to save a complete unknown personstranger.

Even though, aAs we learned from the lecture, once we analisyze the data and take into account other factors, our reading of these seemingly unselfish actions can change drastically.

First, some in-depth research have shown that in reality, and contrary to what appears to be the case, meerkats sentinels do eat before startnding to guard thwhile others' looking for food.

And more than thatimportantly, being closer to the escape route and able to firstly notice the presence of apath, and being able to detect for predators, puts the sentinel is in a privileged position; while the others meerkat are in great danger.

As happens with the meerkats, in the case of humans, sometimes also whatsometimes human behavior that also seems to be an altruistic action entailcarries other kinds of rewards when consideringe from another angle.

In the case of the unselfish kidney donor, he could actually be receiveing some interesbenefit in exchange for his altruistic action.

More social appreciation, a renewed sense of self-worth, and a special place in histhe community are things, that, without being hile non-material, represent important goods for any human being.

According to the most wide spread conception, while selfishness behavior is characterized by the search for individual gains, altruism consists in sacrificing one's interest for the good of others.

Being tTwo examples of this include the meerkat sentinel that be ion guard while the other meerkats look for food or the person that donates one of his kidneys to save a complete unknown personstranger.

Stranger sounds better an unknown person is grammatically correct.

Even though, as we learn from the lecture, once we analisyze the data and take into account other factors, our reading of these seemingly unselfish actions can change drastically.

First, some in-depth research haves shown that in reality, and contrary to what appears to be the case, meerkats sentinels do eat before starting to guard the others' looking for food.

As happens with the meerkats, in the case of humans, sometimes also what seems to be an altruistic action entails other kinds of rewards when considering from another angle.

In the case of the unselfish kidney donor, he could actually receive some interestattention in exchange for his action.

You could also say « something of interest in exchange … »

Altruism rRevisited (ToeflOEFL practice)

We like to capitalize titles and acronyms.

Recent studies on animal and human behavior can challenge common assumptions wthat we’ve made about the reasons behind certain actions towards others.

Instead of “we’ve made,” you could also say “we have.” Saying “we made” implies that the making is finished.

As the lecture shows, that is exactly the case with the ideas and situations commonly described as altruistic.

I would not use “the” here because you have not mentioned the ideas and situations yet.

According to the most widespread conception, while selfishness behavior is characterized by the search for individual gains, altruism consists inof sacrificing one'’s interest for the good of others.

The word “spread” sounds unnatural as an adjective.

Being two examples of this thFor example, meerkats are capable of altruistic behavior. One meerkat sentinel that be inmight stand guard while the other meerkats look for food or th. For another example, one person thatmay donates one of his kidneys to save a complete unknown persontotal stranger.

Even though, as we learn fromHowever, the lecture shows, once we analisyze the data and take into account other factors into account, our reading of these seemingly unselfish actions can change drastically.

First, some in-depth research haves shown that in reality,and contrary to what appears to be the case, meerkats sentinels do eat before starting to guard the others' who are looking for food.

And more than thatMoreover, being closer to the escape route and able topotentially the firstly notice the presence of a predator, the sentinel is in a privileged position;, while the others meerkat ars might be in great danger.

As happens with the meerkats, iIn the case of humans, sometimes alsoas with meerkats, what seems to be an altruistic action entails other kinds ofmight have rewards when consideringed from another angle.

In the case of the seemingly unselfish kidney donor, he could actually receive something that interests him in exchange for his action.

More social appreciation, a renewed sense of self-worth, and a special place in his community are things, that, without being materialhile not tangible, represent important goodresources for any human being.