Answer:
c. the ways in which people respond to one another.
Explanation:
Social interaction is the way in which one person responds to another. It can also be examined between two, three or maybe larger social groups. Normally, it relates to those types of face to face meetings in which people are physically existing with one another for a particularized time. However, in modern civilization, we can also think of social meetings that are technological like skyping, texting or messaging, etc.