What does a model of the carbon cycle show?(1 point)

Question

Responses

The amount of Earth’s carbon cannot be determined.
The amount of Earth’s carbon cannot be determined.

The amount of Earth’s carbon increases.
The amount of Earth’s carbon increases.

The amount of Earth’s carbon is constant.
The amount of Earth’s carbon is constant.

The amount of Earth’s carbon decreases.

Answer 1

The amount of Earth’s carbon is constant.