Question

which atmospheric gas is being described? most abundant, makes up 78% of the atmosphere. methane nitrogen oxygen argon

Explanation:

To determine the atmospheric gas, we recall the composition of Earth's atmosphere. Nitrogen makes up approximately 78% of the atmosphere, which matches the description. Methane is a trace gas, oxygen is about 21%, and argon is a small percentage (around 0.93%).

Answer:

B. nitrogen (assuming the options are labeled, but based on the content, the correct gas is nitrogen)