Carbon is absorbed by the plant as ................. from the air.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks in what form carbon is absorbed by plants from the air.

2. **Identifying Carbon's Role**: Carbon is classified as a macronutrient, which means it is required in large amounts for the growth and development of plants.

3. **Form of Carbon Absorption**: Plants absorb carbon from the air primarily in the form of carbon dioxide (CO2).

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