Carbon originates in the Carbon then moves in the form of to . Through the process of photosynthesis, carbon dioxide is pulled from the air to make food for plant growth. Through the various food , carbon is moved from to the that eat them. When plants and animals , their bodies decompose, and the carbon moves into the . When carbon moves from living things back into the atmosphere it is in the form of . This release of gas happens in a proceed called . Some carbon gets buried and becomes after millions and millions of years.​