The blackness of black holes is peculiar: although there's plenty of light within a black hole, you can't see it from the outside. Yet there's no wall physically blocking the light or bouncing it back in. Instead, gravity keeps the light contained. —A Black Hole Is NOT a Hole,
Carolyn Cinami DeCristofano

What type of description does the author provide in the passage?

examples
features
personal experiences
emotional