Explanation: A simile is a direct comparison between elements that aren't obviously related, it helps the reader to form a mental image and to understand a point. In the given lines we can see two examples of simile, the first one is "the river like the silver track left by a snail" which compares the river with the track left by a snail, and the second one is "and roads as narrow as ribbons" which compares the road with ribbons.
is an advanced Barrier Technique that manifests the user's Innate Domain and traps their target inside it using a barrier wall to create a separate space.