a giant tsunami a strong earthquake a powerful hurricane a large volcanic eruption
I gave my students this multiple choice question: Some natural disasters can have a large effect on the global climate. Which type of natural disaster would produce the greatest decrease in solar radiation reaching the surface of Earth for the longest period of time?

Only one answer is correct among these 4 choices:
- a giant tsunami
- a strong earthquake
- a powerful hurricane
- a large volcanic eruption

Could you tell me which one is correct?

a large volcanic eruption