Correct Answer: Mitochondria

Solution : The correct answer is Mitochondria.

The part of a cell that converts nutrients into energy is the mitochondria. Mitochondria are often referred to as the "powerhouses of the cell" because they are responsible for generating adenosine triphosphate (ATP), which is the primary energy currency of the cell.

Mitochondria are double-membraned organelles found in the cytoplasm of eukaryotic cells. They play a central role in cellular respiration, a complex biochemical process that involves the breakdown of glucose and other organic molecules to produce ATP. This process, known as aerobic respiration, occurs in the mitochondria's inner membrane, where enzymes and electron transport chains are located.