Answer:
B - sub-Sahara Africa
Explanation:
this region is already very dry - there has been over grazing of animals - deforestation that speeds up desertfication
Answer: As altitude increases, atmospheric pressure decreases
Explanation:
Atmospheric pressure
is defined as the force
per unit area
the air that forms the atmosphere exerts on the Earth's surface:

It should be noted that as the altitude increases less air is above and, therefore the air weights less. This is because the atmosphere losses density as we ascend, causing less air.
However, it is important to point out this decrease in pressure is not linear, since at the beginning (in the first kilometers above sea level) it reduces more rapidly than in the next kilometers above. That is why this relationship between atmospheric pressure and altitude is exponential.
Answer: And while 25% of Western pharmaceuticals are derived from Rainforest ingredients, less than 1% of these tropical trees and plants have been tested by scientists. The U.S. National Cancer Institute has identified 3000 plants that are active against cancer cells. 70% of these plants are found in the Rainforest.
Explanation: