It's a staple of interactive fiction to show a set of possible choices together, often at the end of a passage. The Choose Your Own Adventure series of books would have text like this at the bottom of a page:
If you decide to walk along the beach, turn to page 5.
If you decide to climb the rocky hill, turn to page 6.
We don't need to specify page numbers when working in a digital format, of course, but it can still be nice to set off these choices from the rest of the text. Chapbook calls these bundles of links forks, and they are signalled by placing each link on separate line, with
> at its beginning:
> [[Walk along the beach]] > [[Climb the rocky hall]]
Forks display light lines between the links and horizontally center the text of the links. See Fork Style to learn how to change this.