Answer: c.) human population growth causes an increase in the use of resources from rain forests.
Explanation:
The human population is directly dependent upon the surrounding environment for their daily requirement of resources. The rainforests receives a maximum amount of annual rainfall as compared to the other biome this favors the growth and abundance of valuable vegetation in this region. The rainforests are the source of rubber, cocoa, papaya, orchids, wood yielding trees and other valuable varieties sold commercially. With the advent of the human population growth the dependency on the rainforests for resources will also increase.
When guard cells lose potassium ions, water diffuses out of the cells by osmosis. As water leaves the cells, they become flaccid and less bowed, which closes the stomata between them.
