Ray Bradbury is also a writer of science fiction.

what is the subject and the simple subject?

The simple subject and the complete subject are the same: Ray Bradbury.

The subject of the given statement is "Ray Bradbury." The simple subject is "Ray Bradbury" as well.

To determine the subject of a sentence, you can ask the question "Who or what is the sentence about?" In this case, the sentence is about Ray Bradbury, so he becomes the subject.

The simple subject is the main noun or pronoun within the subject. In this case, "Ray Bradbury" is the main name mentioned, so it is the simple subject.