Here's why:

* Circuit: A complete path that allows electricity to flow.

* Components: The individual parts that make up a circuit, each with a specific function.

Let's break down each component:

* Bulb: A component that converts electrical energy into light and heat.

* Cell (or battery): A component that provides the electrical energy to power the circuit.

* Switch: A component that controls the flow of electricity in a circuit, either opening (stopping the flow) or closing (allowing the flow).