Regarding tropical rainforests, the term evapotranspiration refers to the fact that

Atrees absorb carbon dioxide and "exhale" oxygen.
Bthe humidity of rain forests can produce local and regional precipitation.
Cdeforestation causes a decline in atmospheric oxygen.
Ddeforestation causes a loss of soil fertility due to water evaporation

Verified Answer :

I think the answer to your question is c. deforestation causes a decline in atmospheric
oxygen because evapotranspiration means the process by which water is transferred
from the land to the atmosphere by evaporation from the soil and other surfaces by transpiration from plants.