Explain the law of conservation of energy. give a specific example using kinetic and potential energy that shows how energy is conserved.

Energy can neither be created nor destroyed. It is transformed from one to another form.

The example of potential energy raised ball over the round and example for kinetic energy is water is used for moving the turbine to produce electricity.  

Explanation:

This process happens because of conservation of energy. According to the rule of the conservation of energy, energy can’t be created nor destroyed. It is simply converted from one to another form. It simply means this system always need same amount of energy.

Due to motion of object or particle an energy is formed is called kinetic energy and due to relative position of energy an energy is formed is called potential energy.  

your answer should be c) enjoy!