Earth’s original atmosphere was made up of gases similar to those released in volcanic eruptions. Thus, the correct option is D.
Atmosphere is refer to as the area of and gas air enveloping objects in space, like planets and stars , or the air around any area. An example of atmosphere is the ozone layer and other layers that make up the Earth's sky as we usually see it.
Original atmosphere of Earth was mostly just hydrogen and helium, because these were the main gases in the gassy disk, dusty around the Sun from which the planets formed. The Earth atmosphere were very hot. Molecules of hydrogen and helium move really fast specially when warm. Actually, they moved in fast speed so they eventually all escaped Earth's gravity and drifted off into space.
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