Question

question 5
what is the basic definition of a black hole?
an object with gravity so strong not even light can escape
a dead low - mass star which has already faded from view
a method of transportation from one side of the universe to another
any object made from dark matter which emits x rays

Explanation:

A black - hole is defined by its extremely strong gravitational pull. The escape velocity near a black - hole exceeds the speed of light, meaning light cannot escape from it.

Answer:

an object with gravity so strong not even light can escape