I believe the first one but think of the logic int he agreement. You could say 4 and 1 but its not multiple choice.
A belt is a release of gas. Gas exited through your mouth, so when this location is called a bean belt, it is referring to how coffee beans are exiting their original location, like a burp does. (This purely in my opinion, I have no knowledge of this.)
? i’m a little confused on the question