Works protected by the Copyright Law must have certain material expressions that can be used and copied by third parties. Such material expressions are diverse, such as various written works, musical works, and scientific and technological works. This is because works are subject to One of the reasons for legal protection is to make it available and used. Better works exist in the author's mind, and there is no way for third parties to know how to use it. The point directly supported by this passage is:. ['The fundamental reason why copyright is protected by law is that it has a certain material form.', "The protection of the Copyright Law must first be the result of original intellectual labor, such as the author's idea.", 'Periodicals, sheet music, and design drawings can all become the object of copyright protection.', 'One of the necessary conditions for the work to be protected by law is that it must have a certain material expression form.']