Abrother and sister enrolled in a large chemistry class would be considered a(n):

Primary group

Explanation:

This would be an example of a primary group. In order to understand what this is, we need to understand what a social group is. A social group includes two or more humans that interact with one another. Moreover, these people should share some common characteristics as well as feel a sense of unity.

Social groups can be divided into primary and secondary groups. A primary group is formed when members share close personal relationships. This can include families as well as close friends. On the other hand, a secondary group is one in which the relationships between people are impersonal. These groups tend to be goal-oriented and temporary.

answer; broca's area;