A. Ethane
B. Methane
C. Propane
D. Butane
Methane is called marsh gas because it is found at the surface of marshy places (a type of wetland, an area of land where water covers ground for a long period, that are usually treeless and is dominated by grasses and herbaceous plants).
The correct answer to the question: "The marsh gas is ___________?" is "Methane".
