Question

name that cycle
atmospheric co₂
co₂ in ocean
organic matter
fossil fuels
water cycle
phosphorus cycle
nitrogen cycle
carbon cycle

Explanation:

The diagram shows the movement of carbon in different forms (like \(CO_2\), organic matter, fossil fuels). The carbon cycle involves processes such as photosynthesis (plant uptake of \(CO_2\), related to arrow 1), respiration (release of \(CO_2\), e.g., arrow 2), decomposition (formation of organic matter, arrow 4), and combustion (burning of fossil fuels releasing \(CO_2\), arrow 7). The water cycle is about water in liquid, vapor, and solid states. The phosphorus cycle focuses on phosphorus compounds. The nitrogen cycle is about nitrogen forms (\(N_2\), nitrates, etc.). Since the key element here is carbon (in \(CO_2\), organic matter, fossil fuels), it's the carbon cycle.

Answer:

Carbon Cycle