Which excerpt from A Black Hole Is NOT a Hole is meant to help readers understand what a black hole looks like?

“If you could somehow take a close-up picture of a black hole, it wouldn't be one for the scrapbook. It would just be blank . . . and black.”
“Just outside the event horizon of a black hole, light's energy keeps it zipping along, like that fish swimming along the outer edge of a whirlpool.”
“As the light continues traveling in its new direction, it gets even closer to the center of the black hole, where gravity is even stronger.”
“Just as you rely on the rise and fall of a melody's tune and volume to recognize a particular song, scientists look for a unique pattern in the rise and fall of the X-rays to identify a black hole.”