Question

Which statement about the element carbon (C) is TRUE?

There is not enough carbon on the Earth.

Carbon does not exist on Earth and must be mined elsewhere.

There is too much carbon on the Earth.

Carbon cycles through Earth’s systems.

Answer 1

"Carbon cycles through Earth’s systems."

This is true — carbon moves between the atmosphere, oceans, soil, rocks and living organisms via processes like photosynthesis, respiration, decomposition, ocean uptake/release, sedimentation and volcanic/anthropogenic emissions.