Verified Answer :

D the atmosphere
The atmosphere consists of many different kinds of air, like carbon dioxide, oxygen, and nitrogen. This is basically a mixture.
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The answer is D. The atmosphere

Explanation - Elements and compounds are types of pure substances. A mixture is two or more pure substances that are mixed together but can be separated by physical (not chemical) methods.


The atmosphere is a mixture composed of many different gases, such as nitrogen, oxygen, carbon dioxide, and water vapor.