Assume it is. You don't want to get sued.
No, copying and pasting is copyright though.
Yes.
It means that if you copy something copyright and don't give it its props (or credit) you will be sued
You should always look for the copyright information. If there is none then you need to contact the author or owner of the material and ask them. Never assume. Most of the time though you'll see the license. It could be public domain, creative commons, copyright free, or copyrighted, etc, etc. Check the links below for copyright free resources.
It depends on whether you have the right or not. If you control the copyright to something (i.e., you drew/painted/wrote it), you have the exclusive right to copy it or authorize others to do so. If you do not control the copyright, you need an exemption in the law or permission from the copyright holder.
No, it should not. If you wrote something, you own the copyright on it. All you need in order to assert that copyright is proof that you wrote something.
Copyright protection is automatic, so it actually takes effort not to copyright something you create. That being said, copyright allows the creator to ascribe value do and potentially derive income from their creation.
If its a torrent is most likely copywritten
There is no such thing as "un-copyright". Something is either copyrighted or not. If it is copyrighted, then the copyright eventually expires, making it public domain.
Limewire can download copyright-protected files, which is one reason why it is so contentious.
When you click on the link provided below this answer you will be directed to a website that will tell you what the procedure for filing a copyright infringement complaint is.
A business holding a copyright on something can prevent others from abusing it, and make money by licensing its use.