Final answer:
An author writes to amuse or interest the reader primarily to entertain, using elements like humor and storytelling to engage and captivate the audience. Option c is correct.
Step-by-step explanation:
When an author writes to amuse or interest the reader, his or her main purpose is to entertain. The intent behind this type of writing is to engage the reader and provide a sense of enjoyment. This approach might include the use of humor, drama, storytelling, and other creative elements to captivate the audience's attention and emotional interest.
Whether through books, speeches, or articles, the primary goal is to provide a pleasurable experience rather than strictly to inform, persuade, or educate, although these elements can also be present to a lesser degree.