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Answer:
A circuit is a closed loop that electrons can travel in. A source of electricity, such as a battery, provides electrical energy in the circuit. Generally, there is some appliance that uses electricity in the circuit. The appliance may, for example, provide light or heat or mechanical energy.
Explanation:
Classification is subject to change because science is an evolving subject. New things are discovered every year and thus changing the way we understand the world around us.
The basic building blocks of matter are called atoms.
