Question

level 1
which part of the carbon cycle involves animals breathing in oxygen and out carbon dioxide?
a. transpiration
b. decomposition
c. combustion
d. respiration

Explanation:

• Option A: Transpiration is the process by which plants lose water vapor through their leaves, not related to animal gas exchange.
• Option B: Decomposition is the breakdown of dead organisms by decomposers, not animal breathing.
• Option C: Combustion involves burning (e.g., of fossil fuels or biomass), not animal respiration.
• Option D: Respiration in animals (and plants) is the process where they take in oxygen and release carbon dioxide, which is part of the carbon cycle.

Answer:

D. Respiration