If you report somthing on Yahoo Answers and it is harming people and chat what section do you put it in?

In most cases when reporting one would mark it as a community guidelines violation. But if you are reporting something like a threat of violence I would mark it as illegal. If you are not sure which one to mark go with the first option. Marking it as illegal when you should not can result in your reports losing influence.

Marking something as illegal usually causes instant deletion and for the post to be reviewed by Yahoo! Customer Care. These are usually more serious violations and can quickly lead to account suspension.

The second if it causes harm to minors or is illegal in any way.

a second person has to report it too

nothing on yahoo answers can actually harm anyone.

they are just words.