Question

Explain the process of oxygen cycle .

Answer 1

in the biosphere the major oxygen cycles are photosynthesis and respiration.... during photsynthesis plant uses sunlight energy, water, and co2 to make food.

Answer 2

Photosynthesis :–
During the day, plants take energy from the sun, carbon di oxide from the air, and water from the soil to make their food. Their food is simple – glucose. This process is called photosynthesis. Oxygen is released into the air as a by-product of photosynthesis.
During the night, plants take in oxygen and release carbon di oxide, to maintain their metabolism. Which is why it is not a good idea to sleep under trees at night.
2. Respiration :–
The oxygen that is released by plants is used by humans, animals, and other organisms for respiration, i.e. breathing. We use oxygen to break down simple sugars and generate energy to sustain ourselves. During respiration, organisms take in oxygen and release carbon di oxide into the air.
3. Repeat :–
This carbon di oxide is again, taken up by plants, for photosynthesis.
Thus, we see that our life force is generated chiefly by plants. Which is why it is super important to preserve plant life on earth...

Hope it helps you ...