Please help, bio test, freshman honors.

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

This is the process of making a prediction based on the results of prior observations of similar events.