Question

question 8.
what does the term \biogeochemical cycle\ refer to?
a. cycling of nutrients in an ecosystem
b. cycling of minerals in an ecosystem
c. cycling of animals in an ecosystem
d. cycling of water in an ecosystem

Explanation:

A biogeochemical cycle is the cycling of nutrients (such as carbon, nitrogen, phosphorus) in an ecosystem. Minerals are a part of nutrients. Cycling of animals is not a biogeochemical cycle. Cycling of water is the hydrological cycle (a type of biogeochemical cycle but the term "biogeochemical cycle" in general refers to nutrient cycling).

Answer:

A. Cycling of nutrients in an ecosystem