Question

How do humans cycle carbon from the biosphere to the atmosphere?(1 point)
Responses

by planting vegetable crops
by planting vegetable crops

by eating plants
by eating plants

by respiration
by respiration

by driving cars that use gasoline for fuel

Answer 1

Humans cycle carbon from the biosphere to the atmosphere primarily **by respiration**. When humans and other animals breathe, they take in oxygen and release carbon dioxide back into the atmosphere, which is a key part of the carbon cycle.