Given the question: You are presented with the question "What is used to start the flow of current in an electrical circuit?" and the following answer choices: - energy - a doorbell - heat energy - kinetic energy - simple - Firecrackers - cycles - deltas Now knowing that aswitch is used to start the flow of current in an electrical circuit and some systems have an additional connection for a second doorbell switch, choose the best answer.
The answer is:
a doorbell