Question

Rachel is waiting at a red light as a car pulls up from a small side street a few cars in front of her. as the light turns green, no one is letting the car merge onto the main road. as rachel approaches, she waves to the car's driver to signal that he can merge. although her behavior seems genuinely unselfish, rachel likely expects other drivers to return the favor for her someday, which is an example of:

Answer 1

This is an example of reciprocal altruism, because Rachel expects the other driver to return the favor someday.

Answer 2

Which is an example of: reciprocal altruism