Here you will find people cutting down trees for lumber and using the cleared land for farming. A
desert
O. O
B.
Sahel
a
C.
savanna
C
D.
tropical rainforest

D. tropical rainforest

Explanation:

In the tropical rainforests, for example, the Amazon, thousands of trees are burned down or destroyed each year by the government. The reason? For more farmland. The Brazilians have a spiking population, and they need place for the people to live, so they cut down rainforest land. The answer is D. tropical rainforest.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.