Black Holes: The Enigma of Spacetime

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Multiple Choice

What is the event horizon of a black hole?

  1. The boundary beyond which nothing, not even light, can escape from a black hole.
  2. The region around a black hole where spacetime is curved so much that it causes objects to orbit the black hole.
  3. The point at the center of a black hole where all matter is concentrated.
  4. The region around a black hole where spacetime is flat and objects can move freely.
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