Cycles connect biological, geological and chemical aspects of organisms in a biosphere. a) ecological b) hydrological c) transpiration d) biogeochemical

D) biogeochemical

A biogeochemical cycle can be defined as a cycle of substances by which chemical substances moves through abiotic and biotic components of the biosphere. The chemicals substances such as calcium, carbon, water, oxygen, phosphorus, nitrogen and others are cycled by the biogeochemical cycles.

On the basis of the above description, biogeochemical cycles are cycles that connect biological, geological and chemical aspects of organisms in a biosphere.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.