Question

question 69
which processes regulate the natural carbon cycle on our planet?
a photosynthesis, respiration, and decomposition
b decomposition, transpiration, and respiration
c photosynthesis and transpiration
d transpiration and decomposition
e photosynthesis, nitrification, and decomposition

Explanation:

To determine the processes regulating the natural carbon cycle, we analyze each option:

• Option A: Photosynthesis (plants take in \(CO_2\)), respiration (organisms release \(CO_2\)), and decomposition (releases carbon from dead matter) are key carbon - cycle processes.
• Option B: Transpiration is about water movement in plants, not carbon, so this is incorrect.
• Option C: Transpiration is not a carbon - cycle process, so this is wrong.
• Option D: Transpiration is not related to the carbon cycle, so this is incorrect.
• Option E: Nitrification is part of the nitrogen cycle, not the carbon cycle, so this is wrong.

Answer:

A. photosynthesis, respiration, and decomposition