Which force or process is primarily responsible for creating a black hole? Choose one: A. centrifugal force B. the strong nuclear force C. gas pressure D. gravity E. inertia

The correct answer is:<br /><br />**D. gravity**<br /><br />### Explanation:<br />A black hole forms when a massive star collapses under its own **gravity** after exhausting its nuclear fuel. During this collapse, the gravitational force becomes so strong that it overcomes all other forces (such as gas pressure and the strong nuclear force), compressing the matter into an extremely small volume. This creates a region of space where the gravitational pull is so intense that not even light can escape, resulting in a black hole.