Concept:The atmosphere is a mixture of gases, with some gases present in very small (trace) amounts.Explanation:Nitrogen makes up about 78% of the atmosphere.Oxygen makes up about 21% of the atmosphere.Argon makes up about 0.93% of the atmosphere.Carbon dioxide makes up only about 0.04% of the atmosphere.Therefore, carbon dioxide is found in very little quantity among the listed gases.Answer:B. Carbon dioxide