What is an energy conserved system ?

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.

Explanation:

internet

law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. so for example, lighting a stick of dynamite, from potential to kinetic energy or pushing a swing potential to kinetic.

Hope this helps :)

the answer is c. nacl