Highlight the contrast described in the text. With a whirlpool, there’s always a fast-enough fish—or a fast-enough something—that moves so quickly it won’t be pulled all the way into the center.

Not so with a black hole! Within a certain distance the black hole’s power is so strong, nothing is fast enough to zip away.

—A Black Hole Is NOT a Hole,
Carolyn Cinami DeCristofano

What does the contrast help you understand?

how strong a black hole is
how fast a black hole spins
how forcefully black holes push items
how weak other objects are