1. A potential difference (voltage): This creates an electric field within the wire, which exerts a force on the electrons, causing them to move. Think of it like a hill; the voltage is the difference in height, and the electrons "roll" down the hill.
2. A conducting path (the wire): This provides a pathway for the electrons to travel along. The wire's material must allow for the free movement of electrons, like a smooth track for the electrons to move on.
Let me know if you'd like to know more about how these two things work together!
