Describe a biological process by which carbon is converted from organic molecules to a gas and returned to the atmosphere.

Carbon dioxide or bicarbonate converts into organic molecules through photosynthesis of land plants, bacteria, and algae. Organic molecules made by those who use photosynthesis are then passed through the food chain and later through cellular respiration are converted back into carbon dioxide gas and released into the atmosphere. An example would be the slash and burn agriculture practices we are burning organic matter releases carbon into the atmosphere as CO2, CO, or carbon particulates.

Pressure and heat that's what i think( don't report if wrong)