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The primary function of the mitochondria is to:

  1. Create energy

  2. Transport nutrients

  3. Synthesize proteins

  4. Store energy

The correct answer is: Create energy

The primary function of the mitochondria is to create energy. This is done through the process of cellular respiration, in which nutrients and oxygen are broken down to produce ATP, the main source of energy for cells. This process takes place in the mitochondria, specifically in the inner membrane where enzymes are present to carry out the necessary reactions. Options B, C, and D are incorrect because they do not accurately describe the function of the mitochondria. Transporting nutrients, synthesizing proteins, and storing energy are all important processes for the cell, but they are not the primary function of the mitochondria.