He could see the river like the silver track/left by a snail, and roads as narrow as ribbons.
which identifies the type of figurative language that is used twice in these lines?

irony

simile

personification

exaggeration

B) Simile.

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.

the statement flat characters usually only have one trait that is developed in their story lines is true.

reasoning from several particular examples to establish a general principle