Question

a reservoir serves as a long-term storage area for water or nutrients. complete which of the following is a reservoir for carbon and nitrogen, but not phosphorus? ∘ land ∘ ocean ∘ atmosphere done

Explanation:

• Land: Stores phosphorus (e.g., in rocks, soil). Eliminate.
• Ocean: Stores phosphorus (e.g., in marine sediments, organisms). Eliminate.
• Atmosphere: Has carbon (as \( \text{CO}_2 \)) and nitrogen (as \( \text{N}_2 \)), but little phosphorus (no gaseous phosphorus reservoir). So it's the answer.

Answer:

C. atmosphere