Respuesta :

Amrinderkhattra
l think the answer of this question is cellulose
wiseowl2018

Answer:

The correct option is A carbohydrates.

Explanation:

  • Living cells get energy by the process of respiration.
  • Respiration is the process of break down of glucose molecules to release energy.
  • So the main source is glucose ( carbohydrate).

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