Biology

The correct answer is: D.By eating plants or other animals.

Here’s why:

Animals get carbon primarily by consuming plants and/or other animals. Carbon is a fundamental element that is part of all organic molecules, like carbohydrates, fats, and proteins, which are present in the bodies of plants and animals. When animals eat plants, they ingest carbon in the form of organic compounds (such as glucose and starch). When they eat other animals, they also ingest carbon through the food chain.

In animals, carbon is used to build molecules necessary for growth, energy storage, and cellular functions. During respiration, animals break down these organic molecules (like glucose) to release energy, producing carbon dioxide (CO₂) as a byproduct, which is then exhaled back into the atmosphere.

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