What places are carbon stored and released ?

Rocks and sediments.

Explanation: Most of the earths carbon is in these two but there is also carbon in the oceans, atmosphere, and living things.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.