Which of the following are often involved in a biogeochemical cycle? molecules, living things, and the environment living things molecules the environment

In a biogeochemical cycle, molecules, living things and the environment, all the three are often involved.

A

Explanation:

The most common biogeochemical cycles are Carbon-Cycle, Nitrogen Cycle, Oxygen Cycle, and Water or Hydrologic Cycle.

Producers, the plants of an ecosystem consume various fundamental nutrients (inorganic substances) from their surrounding or non-living environment.

The biomass of the producers are formed by these inorganic materials. Then they are used by the population of consumers and it is given back to the surrounding environment ultimately by the reducers such as decomposers.  

This process is called as biogeochemical cycle, the continuous or cyclic exchange of nutrients between the living being and their non-living surrounding environment.