Which of the following describes a circuit?

• A. A physical device that stores data
• B. A path that conducts electricity and can enable operations
• C. A tool for editing code
• D. A type of software license

Answer: (B)

A circuit is a closed path that lets electric current flow. When power is connected through wires and components, the current travels and interacts with those parts to perform work—like lighting a bulb or enabling signals to be processed in a computer. The essential idea is that electricity moves through a designed path to cause operations or changes in the devices it powers. The other choices describe things that aren’t electrical pathways: data storage hardware, a code editor, and a software license.