Which of the following can be used to cross valleys?

Tunnels

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Bridges

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Cable cars

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Trolleys

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Solution

The correct options are
B Bridges
C Cable cars
D Trolleys
The part of low land that lies in between high hills or mountains is called a valley. Bridges, trolleys and cable cars can be used to cross valleys. Tunnel is used to cross mountain in the path that act as obstacle.

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