What term describes the cyclic movement of nutrients between living organisms and the physical environment through biological, geological, and chemical processes?

• A. Biological Factor
• B. Biomass
• C. Carbon Cycle
• D. Biogeochemical Cycle

Answer: (D)

Nutrients cycle between living organisms and the physical environment through biological activity, geological processes, and chemical reactions, creating a continuous flow that links air, water, land, and organisms. The term that describes this entire interconnected system for multiple elements is the biogeochemical cycle. It covers movements of carbon, nitrogen, phosphorus, and others as they are taken up by organisms, transformed through metabolism, released by decomposition, and stored again in rocks, sediments, or the atmosphere.

The carbon cycle is a specific example within this broader framework, focusing only on carbon. The other options don’t capture the full, repeating exchange between life and the environment: a biological factor is a trait or influence on biology, and biomass is simply the mass of living matter.