Describe the process as civilizations in Africa changed from Hunter and Gatherer communities to civilizations.

It is a prehistoric period.

Explanation:

In this context, it is a transition from the Old Stone Age (Paleolithic) to the Late Stone Age (Neolithic). In the Neolithic, people formed permanent settlements and organized evenings of a social community. In this context, they are tied to one place. Therefore, they stopped hunting less and raising their products, and keeping cattle. This period did not occur equally in all parts of the world; the oscillations were even in several centuries. People in the Paleolithic led a nomadic life, but in the Neolithic, they saw the advantage of forming a particular place and creating organized communities.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;