A、The anatomy of sea cucumbers. B、How sea cucumbers protect themselves. C、How to catch a sea cucumber. D、The history of sea cucu

W: Wasn’ t that a fascinating class? Of all the animals in the sea, the sea cucumber, with its bizarre self defense mechanism, has always interested me.
M: Dr. Lambert sure knows what he is talking about, but I still don’t understand why he said that the sea cucumber defends itself by spitting out its internal organs. He carefully explained its distinct method of escaping capture, but I am not sure that it made sense.
W: Wasn’ t that a fascinating part of the lecture! When the sea cucumber feels threatened, it strongly contracts its muscles and discharges its internal organs towards the attacker. That usually confuses the attacker enough to leave the sea cucumber alone.
M: That’ s certainly a unique way to defend yourself from danger.
Q1: What is the main topic of this conversation?
Q2: How does a sea cucumber protect itself?
Q3: Why was the man confused?