What causes tsunamis?

Q: Who is the author of your article?
A: No author.
Q: Who is the publisher?
A: Geology.com published this article.
Q: What are three things that you learned?
A: I learned about how earthquakes triggers tsunamis, subduction zones, and about accumulated energy that can cuase tsunamis.
Q: What are two things that you found interseting.
A: I found how earthquakes triggers tsunamis interesting and the subduction zones were interesting.
Q: What is one question you still have?
A: I want to know what was the biggest tsunami.