Write internal links?

so I want to add a set of links at the bottom of my page
HOME|ABOUT|DOG|FOOD
but I am confusd how to write that code, I am running on a localhost right now (FYI). There is no file ext to link to like “dog.htm” that I can write in a <a href> tag to call that page. How do I handle this, can this be done without a plugin?