A substance that has a specific shape and volume changes to a substance that has a specific volume is the statement that best describes this change in question. The correct option among all the options that are given in the question is the third option. I hope the answer helps you.
Energy
efficiency describes the ability to obtain a given result or amount of output
while using less energy input. energy conservation describes the practice of
reducing wasteful or unnecessary energy use.
Energy
efficiency represents the ratio between the useful output and input of an
energy.
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Energy
conservation represents a process which is used to reduce the quantity of
energy that is used.</span>