Question

Which of the following maintains the balance of oxygen and carbon dioxide in the air?

• A. photosynthesis
• B. respiration
• C. evaporation
• D. combustion

Answer 1

The correct option is A

photosynthesis

The correct option is A.

Explanation of the Correct Option:

• Photosynthesis is the process by which plants utilize atmospheric carbon dioxide and release back oxygen.
• Without photosynthesis, there would be a significant increase in the carbon dioxide level in the air and consequently a dip in the amount of oxygen.

Explanation of the Incorrect Options:

Option B:

• Respiration is when oxygen from the outside enters the cells, and carbon dioxide releases back. In this process, energy is generated by the cell.

Option C:

• Evaporation is the process of conversion of water into water vapor.

Option D:

• Combustion is the process wherein a substance in the presence of oxygen burns to release energy in the form of heat.

Therefore, the process of photosynthesis maintains the balance of oxygen and carbon dioxide in the air.