Which of the following can be used to cross valleys?

Option 1: Tunnels Option 2: Bridges Option 3: Cable cars Option 4: Trolleys

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Correct options are:

  • B: Bridges
  • C: Cable cars
  • D: Trolleys

A valley is defined as a low land area situated between high hills or mountains. To traverse valleys, one can use bridges, trolleys, and cable cars. On the other hand, a tunnel is generally used to pass through mountains when they act as obstacles.

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