The social structure of native american groups was often based on a. family and clan
b. location
c. the environment
d. individualism

C

Explanation:

Native American Social Structure Early European settlers referred to the tribal chiefs as "kings." Generosity and good deeds were more respected than wealth and possessions. Clan membership was determined by the child's mother in some tribes and by the child's father in other tribes.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.