Explanation:
c.
it keeps the ground clean
An idea intended to make the reader take notice and want to read on is called a hook
Allegory. Nature.
Theme. The need for each individual to avoid conformity and false consistency, and follow their own instincts and ideas.
Metaphor. "The eye was placed where one ray should fall, that it might testify of that particular ray.
Allusion.
Point of View.
Simile.
Imagery.
Irony.