Is the sentence in bold the main idea?

Question

Camels groan and grumble, just as some people do. Put a load on a camel's back, and it will moan. Take the load off, and the camel will groan. It isn't always having a load that makes the camel grumble. Some people think camels just like to grumble.

Answer 1

Yes, the sentence "Some people think camels just like to grumble" is the main idea of the passage.