Question

the following diagram describes the carbon cycle. which process is represented by arrow i? choose 1 answer: a decomposition b combustion of fossil fuels c photosynthesis d cellular respiration

Explanation:

To determine the process of Arrow I, analyze the carbon cycle diagram:

• Option A (decomposition): Decomposition releases CO₂ from organic matter, but Arrow I connects consumers (or organisms) to CO₂, not organic matter decomposition.
• Option B (combustion of fossil fuels): This is associated with industrial emissions (Arrow II, linked to factories), not Arrow I.
• Option C (photosynthesis): Photosynthesis absorbs CO₂ (Arrow IV, from CO₂ to producers), so it is the reverse of Arrow I.
• Option D (cellular respiration): Organisms (producers, consumers) perform cellular respiration, releasing CO₂ into the atmosphere. Arrow I connects consumers (and organisms) to CO₂, matching this process.

Answer:

D. cellular respiration