Final answer:
Scott used narration and comparison as supporting materials in his speech on computer literacy.
Step-by-step explanation:
Scott used narration to tell a story about his experience with computer literacy. He compared his ability to perform basic computer tasks to his knowledge of changing a car's windshield wiper blades, using a comparison. This supported his statement that knowing these basic tasks does not make him computer literate.
Learn more about Supporting materials in a speech on computer literacy