Question

which statement describes an important role of carbon dioxide in earths atmosphere? animals breathe carbon dioxide. plants use carbon dioxide to make food. carbon dioxide helps animals make proteins. carbon dioxide forms clouds that produce rain.

Explanation:

• Animals breathe in oxygen and exhale carbon dioxide, so the first option is incorrect.
• Plants perform photosynthesis, a process where they use carbon dioxide, water, and sunlight to produce glucose (food) and oxygen, making this option correct.
• Carbon dioxide is not involved in animal protein synthesis; proteins are made from amino acids, so the third option is incorrect.
• Clouds are formed by water vapor, not carbon dioxide, so the fourth option is incorrect.

Answer:

B. Plants use carbon dioxide to make food.