Wich organelle is responsible for energy production in the cell?

The organelle that doses this is called the mitochondrion. Mitochondria are the "energy powerhouses" of animal cells. They are responsible for energy production to meet the needs of the cell as it carries out it's life processes.

the mitochondria (or mitochondrion) is the 'power house' of the cell.

carbon atoms, hydrogen, oxygen, and nitrogen.