Question

3. Living systems consist of organisms interacting with their environments. The carbon cycle is an example of a living system. Assuming the carbon cycle is a closed system, which of the following statements is true?

Answer 1

I encountered a similar question with these give choices:

A) Mass and energy are conserved in the carbon cycle.
 B) When all the fossil fuels are used up, there will be no more carbon.
 C) As population sizes increase, more carbon is produced.
 D) The Sun absorbs energy from the carbon cycle.

Among the choices, only choice A is the true statement.

Mass and energy are conserved in the carbon cycle. This is known as the Law of Conservation of Energy and Law of Conservation of Mass. 

Mass and energy remains constant. They are neither created nor destroyed. They simply are recycled and take on different forms but are of the same measure.

Answer 2

Answer:

Mass and energy are conserved in the carbon cycle.