Question

Which of the following parts of the carbon cycle would be considered biological processes?

a
animal respiration
b
volcanic eruption
c
fossil fuel combustion
d
All the listed are considered biological processes.

Answer 1

Among the options listed, the part of the carbon cycle that would be considered a biological process is:

a. animal respiration

Volcanic eruption and fossil fuel combustion are geological and combustion processes, respectively, and are not classified as biological. Therefore, the correct choice is "a" only.