Question

Which rhetorical device establishes a clear contrasting, or opposite, relationship between two ideas?

Answer 1

Antithesis. The definition is "a thing that is the opposite of, or contrasting to, another thing", basically.

Answer 2

Let me see if I can help you.
An analogy is a reference to something, so probably not that one.
An antithesis is an opposite, so it could be this.
A parallelism means they are similar, so probably not this one.
An analogy is a comparison of things to show that they are similar, so probably not this one either.

That makes the most logical choice B. Antithesis