It is automatic under international law, yes. Provided you created the item from scratch and have a clear copyright notice on the item.
However there may also be additional local laws in your country. Some countries may require you to register your work with some organisation in order to get legal aid when there is a copyright infringement dispute.
Aside from international law, in the United Kingdom, all works produced by an individual is automatically copyrighted under British law. That means if a British citizen writes a book and publishes it, that book is now copyrighted under both international and British law.
Unless the material was either:
True
True
true
True
true
Illusions are created when something tricks the brain into believing something that isn't true.
True.
True
We can't answer questions from printed/copyrighted materials.
True
True
Yes, it is true.