Question

1. based on what you have seen, what must be true for a circuit to light a bulb?

Explanation:

To light a bulb, the circuit must form a complete, unbroken path for electric current to flow from the power source (like a battery) through the bulb and back to the source. The circuit must include a functional power source, a working bulb, and conducting connections with no gaps or breaks that would stop the current.

Answer:

The circuit must be a closed, complete loop that connects a functional power source to the bulb, allowing electric current to flow continuously through the bulb's filament.