Most people in africa live on grassy plains , commonly known as the

Most people in Africa live on the savannas, or grassy plains. Africa's savannas are not just endless plains. They include mountainous highlands and swampy tropical stretches. Covered with tall grasses and dotted with trees, the savannas cover over 40 percent of the continent.

Explanation:

ba geologist finds four sedimentary rock she determines that no geologic events have shifted the layers she labeles them a,b,c,dbfrom top to bottom

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity