Question

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

Explanation:

• Photosynthesis: Involves carbon (CO₂ to glucose) but not nitrogen cycling.
• Transpiration: About water movement in plants, not C/N cycling.
• Decomposition: Decomposers break down organic matter, releasing C (as CO₂) and N (as ammonia, etc.) back to the environment, crucial for both cycles.
• Respiration: Releases CO₂ (carbon cycle) but not a key process for nitrogen cycling.

Answer:

C. decomposition