The correct answer is d. Mitochondria.
Explanation:
1. The releasing of energy from food takes place in the mitochondria of a cell.
2. Mitochondria are known as the powerhouses of the cell because they are responsible for converting the energy stored in food molecules into a form of energy that the cell can use called adenosine triphosphate (ATP).
3. Within the mitochondria, a process called cellular respiration occurs, where glucose and oxygen are used to produce ATP through a series of complex biochemical reactions.
4. This ATP serves as the main energy currency of the cell, providing the necessary energy for various cellular activities and functions.
In summary, the mitochondria play a crucial role in the process of releasing energy from food molecules, enabling cells to function and carry out their essential tasks.