The gas that is removed from the atmosphere by plant and algae is

Options

A. nitrogen
B. oxygen
C. carbon dioxide
D. methane

Answer

**Step-by-Step Solution:**

1. **Understanding the Atmosphere**: The atmosphere is a layer of gases surrounding the Earth, which includes nitrogen, oxygen, argon, and carbon dioxide among others.

2. **Role of Plants and Algae**: Plants and algae play a crucial role in the ecosystem, particularly through the process of photosynthesis. During photosynthesis, they convert sunlight into chemical energy.

3. **Photosynthesis Process**: Photosynthesis requires sunlight, carbon dioxide (CO2), and water. The green pigment chlorophyll, found in the leaves, is essential for trapping sunlight.

4. **Source of Carbon Dioxide**: Plants and algae absorb carbon dioxide from the atmosphere as part of the photosynthesis process. This gas is crucial for the production of glucose and oxygen.

5. **Oxygen Production**: As a byproduct of photosynthesis, oxygen is released into the atmosphere, which is vital for the survival of most living organisms.

6. **Conclusion**: Therefore, the gas that is removed from the atmosphere by plants and algae is carbon dioxide (CO2).

**Final Answer**: Carbon Dioxide.

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