Final answer:
Hyperlinks are words or graphics that you can click on to display a webpage or other resources on the Internet.
Step-by-step explanation:
Hyperlinks
Hyperlinks are words or graphics that you can click on to display a webpage or other resources on the Internet. They are a functional tool and employ the visual mode to command the reader's attention. Hyperlinks are commonly used in webpages, blog posts, and online texts to provide additional information or resources related to the content being discussed.
For example, if you are reading an article about a scientific study, you may come across a hyperlink that takes you to the full research paper. This allows you to access more in-depth information without having to search for it separately.
So, the correct answer to your question is a) Hyperlinks.