What does the law of conservation of energy state about energy in a closed system?

Question

Energy cannot be created or destroyed.
Energy can be created but not destroyed.
Energy can be destroyed but not created.
Energy can be either destroyed or created.

Answer 1

The law of conservation of energy states that in a closed system, energy cannot be created or destroyed; it can only be transformed from one form to another. Therefore, the correct option is:

Energy cannot be created or destroyed.