If you will answer wil get the branliest. which best explains how rivers affected the interaction between prehistoric groups? they protected groups from invasion. they invited interaction with other regions. they kept groups separate most of the time. they let groups divide and form unique cultures.

They invited interaction with other regions.

Explanation:

In general, when various civilizations settle along a particular river, this leads them to have interaction and even cultural exchange with one another. This is because water is a necessary resource for all people. Therefore, it is likely that several groups would desire to be close to this resource. Moreover, rivers tend to be effective as a means of transportation, allowing people to reach faraway areas more easily and quickly than when travelling over land.

the correct statement is letter a.   according to the mandate of heaven, kings were considered godlike beings, so they could do as they .

the mandate of heaven is a chinese political and religious ideology used since ancient times to justify the rule of the king or emperor of china, that has been in place since the zhou until the dynasty system ended. it has been created to justify the zhou as the main power of the region. in order to keep harmony, the ruler has to make what he wants and what people want. he had to make good choices to satisfy the people and then they will be happy and keep you in power.