Why do black holes trap light?

Answer: Gravity bends space too much

They absorb light energy — Wrong. Black holes don't absorb light like dark paint. The mechanism involves gravity and spacetime.

Gravity bends space too much ✓ — Correct! Black holes have such extreme gravity that they curve spacetime completely around themselves. Light follows the curved space and can't escape. The boundary where this happens is called the event horizon—nothing can return from beyond it!

Black holes are very dark — Wrong. Being dark is the result, not the cause. Light can't escape because of extreme gravitational spacetime curvature.