Which of the following is/are the uses of air?

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Combustion, Photosynthesis, Respiration, Maintaining temperature.

Combustion, Nutrition, Excretion, Decomposition

Decomposition, Combustion, Maintaining volume, Growth

Growth, Nutrition, Energy, Maintaining pressure

answer is A.

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Detailed Solution

Air is used for combustion, photosynthesis, respiration, and maintaining temperature.
Air is an important natural resource. Combustion is the burning of fuels in the presence of oxygen that is present in the air. Photosynthesis is the process of the preparation of glucose by using oxygen and water. Plants take oxygen from the air. Respiration is the process of decomposition of food to provide energy to organisms. For this, the organisms take in oxygen which is used by the cells to break down sugar and obtain energy, and also carbon dioxide is liberated. Air also helps in maintaining the temperature as it circulates hot and cold air. The water cycle is also dependent on the air.

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