Which type of carbon source is predominantly found in peat?

Peat is primarily composed of organic matter, which is the result of the accumulation of partially decomposed plant material in waterlogged conditions. As plants die and accumulate in anaerobic environments, they undergo slow decomposition, leading to the formation of peat. This accumulation is rich in organic carbon, making it the predominant type of carbon source present in peat.

In contrast, inorganic carbon typically refers to carbonates and carbon dioxide found in minerals and the atmosphere, which are not the main components of peat. Carbon dioxide is a gaseous component that can be part of the carbon cycle but is not the primary source found in peat. Carbon monoxide, while also a form of carbon, is not relevant in the context of peat composition, as it is typically a byproduct of incomplete combustion and does not contribute significantly to the carbon content of peat. Therefore, the correct identification of organic carbon as the dominant source accurately reflects the biological processes that contribute to peat formation.