Answer:
To ease the navigation
Step-by-step explanation:
From Mesa Public Schools, "Adding hyperlinks to your essay gives the reader control over whether she wants to continue reading your work or click the links to expand her knowledge of what you're discussing. Rather than adding explanations, details and definitions that not every reader needs, place a hyperlink in your essay."
This wouldn't help your grammar, and this wouldn't increase the "security" or reliability on your essay, so I would go with, "to ease the navigation." This is because it makes it easier to know where to go if you want to learn more information on said topic.