Question

how have changes in the sahel impacted people living in the region?
o increased numbers of cataracts have caused more severe droughts.
o desertification has reduced usable land and threatened traditional herding.
o desertification has improved soil quality for growing tropical crops.
o increased numbers of cataracts have made it easier to trade with other countries.

Explanation:

Desertification in the Sahel has led to a reduction in arable land. This directly affects pastoralists who rely on grazing land for their livestock. With less land available, traditional herding practices are threatened as there is insufficient space for animals to graze. Cataracts are not the main factor causing droughts in the Sahel. Desertification degrades soil quality rather than improving it. Also, cataracts would hinder (not ease) trade via waterways.

Answer:

Desertification has reduced usable land and threatened traditional herding.