Welcome to Fluther, @janelle!
Any of the reasons that come up when you click to flag a question or answer are acceptable.
You can’t really compare cyberbullying to being upset or offended by someone’s question or response on this site. Yes, cyberbullying happens, and it’s awful; but in the context of this site, you shouldn’t encounter anything of that extent. Someone saying something that offends or upsets you does not mean that their question or response is worth removing, so don’t have that misconception. There is an age requirement on this site to help ensure the maturity of members. If you cannot handle people saying things that you might not want to hear, this site is probably not for you.
If someone goes to far as to personally attack another member, however, their response is immediately removed, so make sure to flag anything like that. And if for some reason you do feel that you are being repeatedly bullied or harassed by a member, be sure to tell a mod or the community manager.