Question

Question #8d0da

Answer 1

By photosynthesis and respiration.

Explanation:

1. The plants utilise carbon dioxide during the photosynthesis. The carbon dioxide is reduced to glucose and oxygen is released by the photolysis of water as by product.
2. All organisms including plants utilise oxygen during the process of respiration for the oxidation of glucose and carbondioxide is released.
3. By these processes plants maitain the balance of carbon dioxide and oxygen in atmosphere. Thank you