Respiration involves the breakdown of sugar this process results in the production of energy for the cell in order for cells to produce the most energy, what has should be present

The process of cells producing energy is metabolism.

This happens from respiration in organisms (animals to plants to bacteria).

Can be written as:

Respiration = Oxygen (O2) + Glucose (C6H12O6) = Water (H2O) + Carbon dioxide (CO2)