the cause and effects of these events. Each number in parentheses is how many sentences should be there.

In historical terms, every event has a cause, and is itself the cause of subsequent events, which may therefore be considered its effect(s), or consequences.Use parentheses to enclose information that clarifies or is used as an aside. Example: He finally answered (after taking five minutes to think) that he did not understand the question. If material in parentheses ends a sentence, the period goes after the parentheses.

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.