Electricity conductors

This task is about how some materials can conduct electricity.

Question

Using the information in the diagrams above, which of the bulbs will light up?

    • 1 and 2

    • 2 and 3

    • 3 and 4

    • 1, 2, and 3

    • 2, 3, and 4

Why would the bulbs you chose light up?