Multiple choice general knowledge

What famous North American landmark is constantly moving backward?

  1. Niagara Falls

  2. White house

  3. Empire State Building

  4. The Grand Canyon
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A Correct answer
Explanation

Niagara Falls is continuously eroding and moving backward due to the force of water. The falls retreat about 1 foot per year as the water wears away the rock beneath, making this North American landmark constantly shift its position.

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