During burial, most of the hydrogen and oxygen are expelled from peat to concentrate carbon and form coal.

True.

Explanation:

As peat is an accumulation of the partly decomposed vegetation and is found near bogs and peatlands and its considers to be the most efficient carbon system of the planet and thus they are harvested as important for fuel in the world. If hydrogen and oxygen are expelled from peat 106 gm of carbon dioxide is released. and can be sued to form fossil fuel. As it has high carbon content it can be concentrated to form coal as it becomes lighter and increasing sedimentation for which it must be buried 4 to 10 km deep in the earth.