Question

Your roommate was running late and forgot his wallet, so you bought him lunch. Later that day, he brings you a large cup of your favorite coffee to help you stay awake for a long night of studying. This is an example of

Answer 1

This is an example of mutual friendship.

Step-by-step explanation:

In the case of my roommate bringing me a cup of coffee to help me stay awake is a simple way of him repaying the good deed I did earlier by buying him a lunch. He taught that it was a good way to show his appreciation for what I did earlier.