Question

which process plays an important role in the cycling of both carbon and nitrogen?
photosynthesis
transpiration
decomposition
respiration

Explanation:

Photosynthesis mainly cycles carbon by taking in carbon - dioxide and releasing oxygen. Transpiration is related to water movement. Respiration releases carbon - dioxide but has less to do with nitrogen cycling. Decomposition breaks down organic matter, releasing both carbon and nitrogen back into the environment, playing a key role in both carbon and nitrogen cycles.

Answer:

C. decomposition