Answer:

According to the rule of conservation of energy, energy cannot be generated or destroyed; it can only be transformed from one type of energy to another. This indicates that unless energy is added from outside, a system always has the same quantity of energy.

Explanation:

Example: Water may generate energy. When water falls from the sky, potential energy is converted to kinetic energy. This energy is then used to turn the turbine of a generator, which generates electricity. Water's potential energy in a dam can be converted to kinetic energy. Energy is not created, it is just converted. In a sense, we get all our energy from the sun, because plants get the light energy, creates food out of that energy, and when we eat it, the energy is transported to us.