Question

The most vital process for the existence of life on earth is

• A. Communication in animals
• B. Photosynthesis by plants
• C. Reproduction in plants and animals
• D. Respiration in animals

Answer 1

The correct option is B Photosynthesis by plants

Photosynthesis is the life saving process because it enables the producers, that is the green plants to produce their own food. This is consumed by the consumers. In addition to it, this process helps in absorption of CO${}_2$, which is a green house gas. It helps in the liberation of oxygen, the gas required in plenty for respiration of all living beings.

So, the correct answer is option B.