How to hyperlink a word:

Start with finding the hyperlink-icon next to the other Format text icons.
The forum tag hyperlink is the Globe-looking hyperlink icon

This causes the url formatting tag to be inserted in your text where the cursor is located. It looks like this:

[url][/url]


After that you need to manually add these characters: ="" to that tag

[url=""][/url]


Next you insert the link (in blue) between the quote-signs and the text (in red) between the start- and end- url-tag:
[url="http://animaldiversity.ummz.umich.edu/site/index.html"]Awesome website[/url]


The result:
Awesome website

Just as when you edit a written text in standard word-processors to change formatting to bold, or italics, you can likewise create a hyperlink.

Simply select the word or words you want to make into a hyperlink.
"A cool website to -->view the taxonomy<--- of almost any living animal."

Then click on the hyperlink icon

The text editor will insert the URL-formatting tags at the appropriate places:
"A cool website to [url]view the taxonomy[/url] of almost any living animal."

Just as in the first example, add the characters: ="" (one equal-char and two quote-chars) in the first tag:
"A cool website to [url=""]view the taxonomy[/url] of almost any living animal."

Then what is left is to copy-and-paste the URL-link in between the two quotation marks. Either by standard copy-and-paste command, but most browsers also support drag-and-drop.

"A cool website to [url="http://animaldiversity.ummz.umich.edu/site/index.html"]view the taxonomy[/url] of almost any living animal."

End result: "A cool website to view the taxonomy of almost any living animal."