The answer is copyright.
A patent is a form of protection granted for an invention, which is a new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof. It does not apply to writings, musical compositions, or works of art.
Copyright is the correct answer because it protects original works of authorship, such as writings, music, and art, giving the creator exclusive rights to use and distribute their work.
A franchise is a type of license that a party (franchisee) acquires to allow them to have access to a business's proprietary knowledge, processes, and trademarks in order to allow the party to sell a product or provide a service under the business's name. It is not related to intellectual property protection for creative works.
A trademark is a symbol, word, or words legally registered or established by use as representing a company or product. It is used to protect brand names and logos, not creative works like writings or music.