My brother's IGNORANCE was laughable.
The used rhetorical device is Hyperbole.
Saying that something is a billion times better is hyperbole because it is not really that much better, you would just be over exaggerating.
Can we see the paragraph?
I believe the correct answer is the second choice: <span>We walked through the Red Oak Nature Center today; it was surprising how many bicyclists were there.
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