Question

Which cycle is Earth's greenhouse effect most directly related to?

Answer 1

B. carbon cycle 

Carbon cycle is related because of the CO2 gases that creates extreme thermal conditions within the earth's temperature although there are other gases related too.

The carbon cycle is important to all ecosystems as well as the food chain.A benefit of the carbon cycle is that it is critical to the food chain. Carbon is an important element in living tissues and in all organic matter. All living things are made of carbon.