What is true about lightning?

Lightning occurs when there is a discharge of electricity between oppositely charged areas, typically between a cloud and the ground, or between clouds. This discharge happens when the electric field strength becomes sufficiently high to overcome the insulating properties of the air. During a thunderstorm, updrafts and downdrafts cause the separation of charges within the cloud, leading to positive charges accumulating at the top and negative charges at the bottom. When the electric potential between these charges becomes too great, it results in a lightning strike.

Understanding this process highlights why the statement regarding opposite charges correctly captures the fundamental mechanics behind lightning. It emphasizes the significance of charge separation and discharge in the formation of lightning, which is a critical aspect of atmospheric science and safety in sports facilities and outdoor events.