One of the methods that best
describe the reduction of energy is energy conservation. It is the usage of
less energy service that it usually utilizes. An example is using bike for
transportation instead of a car to save fuel. The answer is letter B. It is not
energy efficiency because it represents how efficient a substance can convert work
at 100%. It is not reservation because there is no term for it. It is not
energy holding because it defines the how much energy the body can hold.
