Answer:
Mitochondria
Step-by-step explanation:
Since Mitochondria are the powerhouse of the cell, and their function is to provide ATP/energy to the rest of the cell, it will be the answer to the question.
Why other answers won't work:
1. Ribosomes help in protein synthesis and are directly not related to energy
2. Chloroplasts are not present in animal cells because animals do not perform photosynthesis
3. Vacuoles store water, waste, and food. They do not help in the energy production for the cell.