Question -The component of air used by green plants to make their food is:
Options:
A .  Sulphur dioxide
B .  Nitrogen
C .  Oxygen
D .   Carbon dioxide
Answer: Option D : D Plants need carbon dioxide for photosynthesis through which they produce food for themselves.During photosynthesis, plants take in sunlight, water and carbon dioxide toproduce starch andrelease oxygen as a byproduct.
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