Which statement best identifies the type and use of
description?
Read this excerpt from A Black Hole Is NOT a Hole.
Acting on the hint, scientists search the X-rays for patterns
that most likely signal black holes. One pattern is an X-ray
ring that seems to surround nothing. The nothing part might
be a black hole. If so, the ring is energy released by super-
heated matter spiraling just outside the event horizon.
The word is signals a characteristic of an X-ray pattern.
The phrase most likely signals an example of an X-ray
pattern.
The word is signals a characteristic of a spiral.
The phrase most likely signals a feature of a black hole,

Walking is not the most exciting form of exercise a person can take on for fitness. yet it is low impact and requires no fancy equipment. that makes walking a simple activity for those new to exercise. walking is less likely than other exercises to cause injury to leg tendons and muscles. all it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. of course, a person could increase the benefit of a workout by adding weights or speed walking. identify the main idea of this paragraph. walking is a difficult and safe exercise for beginners. walking is an easy and safe exercise for beginners. walking is a boring and dangerous form of exercise. walking is an exciting and very effective form of exercise.