which part of a thunderstorm is the most threatening?\nthunder\nwind\nrain\nlightning

Brief Explanations:

Lightning is extremely dangerous as it can strike from the cloud to the ground, causing fires, power - outages, and posing a direct threat to human life and property. Thunder is just the sound produced by lightning, wind and rain are also associated with thunderstorms but are generally less immediately life - threatening compared to lightning.

Answer:

D. lightning