Explanation: Lighting is induction So Eliminate any answer that says conduction . When they loom over us in the gloomy sky, positive charges are induced on the objects on the ground, as a result of electrostatic induction. I also Did more research and it had said as the negative charge in the cloud increases, the ground responds by becoming more positively charged. Similarly, the positive charge in the anvil can cause a negative charge to build up on the ground under the anvil (which may extend far from the thunderstorm base). I hope this helps.
