Answer
D) Methane
Step-by-step explanation:
Methane is a gas that has been released into the atmosphere by natural processes. The methane that has usually been produced by the sources that are natural is completely balanced by the natural methane sinks. termites, wetlands and the oceans are all the natural sources through which the methane is released or emitted we can that in the form of gas. This gas is one of the most potent greenhouse gases in the atmosphere of the Earth.