Travis helped Carlos work on his car. In return, Carlos helped Travis learn some guitar chords. Travis didn't expect to get some extra guitar help, but now Travis is inspired to help Carlos again, since it seems Carlos always returns a favor. What does this situation describe

the paradox of altruism

Explanation:

Altruism is simply defined as selfless actions exhibited by people.

An altruistic person does things for others without plans or hopes of anything in return.

Paradox on its own means a statement or idea that seems to contradict itself. This implies an idea or statement that says a thing and mean another thing.

The paradox of altruism means altruism contradicting itself. That means, the act of doing something for another due to something else in return.

From the illustrations Travis who likes doing things for people without expecting anything in return being inspired to help Carlos because Carlos will always return a favour indicated a paradox in altruism.