Alex coral study for her physics exam even though he is stressed about taking his own genetics exam. he is sacrificing his time for coral's benefit, which is an example of altruism. were he to expect coral to return the favor by him study the next day, this would be an example of:

Reciprocal altruism

Explanation:

When you out your time and effort in doing something for someone and you also expect that they will also do that in return this is called reciprocal altruism.

It is like giving back just as someone has given to you .

I do you a favour and you also do me a favour when I am in need of a favour.

Coral helps Alex to study for her physics exam, she can do the same thing by helping him now study for his genetic exam as he also did out his own will for her.

the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.

answer; albert bandura;