Question

how does carbon enter the biotic components of the carbon cycle? a through the process of respiration b through the process of photosynthesis c through the combustion of fossil fuels d through decomposition of dead organisms according to the law of conservation of matter, matter is not created

Explanation:

To determine how carbon enters the biotic components of the carbon cycle, we analyze each option:

• Option A (respiration) releases carbon from biotic to abiotic (as CO₂), so it's incorrect.
• Option B (photosynthesis): Plants use CO₂ (abiotic) to make organic matter (biotic), so carbon enters biotic here.
• Option C (fossil fuel combustion) releases carbon from abiotic (fossil fuels) to abiotic (atmosphere), incorrect.
• Option D (decomposition of dead organisms) releases carbon from biotic to abiotic, incorrect.

Answer:

B. through the process of photosynthesis