What evidence can be used to explain that energy cannot be created nor destroyed?

The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another. Hopefully i helped

Explanation:

Because energy isn't a substance it's basically just like how electricity cannot be created or destroyed, it just can't be contained