For a series of three or more items to be a parallel, they must act as a single unified sentence
be the same part of speech
come before the verb in the sentence
use different endings in each word

where are the answer choices?

motion can be transfered from one object to another by having an objetct in motion push or hit it

answer is b,

"the tracer looks harmless in flight, but the pilot’s bitten lips and white knuckles suggest how dangerous it can be."

it was correct.

who r u questiiiobnn