Question

Oxygen is not returned to the atmosphere by which of the following?

• A. burning of fossil fuel
• B. respiration
• C. photosynthesis
• D. fungi

Answer 1

Answer: (A), (B), (D)

The correct options are
A

burning of fossil fuel

B

respiration

D

fungi

Photosynthesis is a process by which plants convert carbon dioxide into glucose in the presence of sunlight and oxygen is given out as a by-product. This process is mainly responsible for the release of oxygen into the atmosphere.Other processes like burning of fossil fuel, respiration, fungi give out carbon dioxide($C{O}_2$) into the atmosphere by taking in oxygen.