One reason that rainforests have more precipitation than deserts is
a. plants in the desert experience a large amount of transpiration
b. plants in the rainforest release a large amount of water to the atmosphere
c. plants in the rainforest experience a small amount of transpiration
d. the fewer plants an area has, the smaller the amount of transpiration there is

Option B is correct.

Explanation:

A rainforest, as its name implies, contains a great number of trees and vegetation. Each tree releases a great daily amount of water to the atmosphere through the transpiration process.

Transpiration occurs when the water stored in the tree, is released through the leaves, this water is then evaporated and rises to the atmosphere as water vapor, which then can fall back as rain.

The lack of trees, vegetation, and humidity in a desert make this process nearly impossible. Therefore, the few plants living in the desert use different methods to keep themselves hydrated.