What molecules do plants take in for their energy needs

Plants use a process called photosynthesis to make food. During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch.

Explanation:

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Photosynthesis is the process by which plants produce food. Plants use their leaves to trap light energy during photosynthesis. Plants use the sun's energy to convert water and carbon dioxide into glucose, a sugar. Plants use glucose for energy and to manufacture cellulose and starch, among other things.

Another explanation:

Also, photosynthesis is a chemical reaction that takes place in a plant's leaves and requires both chlorophyll and light energy. Chlorophyll in leaves aids in the conversion of carbon dioxide and water into oxygen and glucose during photosynthesis. Glucose serves as a critical source of nutrition for the plant.