Question

Choose a solution that would help in crossing a fast flowing river and a valley.

• A. Bridge
• B. Trolley

Answer 1

The correct option is B Trolley

Bridge and trolley both can be used to cross the river.
But, it is very difficult to build a bridge on cliffs of mountains due to uneven surfaces.
A trolley can help in crossing both the river and the valley. So, trolley is the correct answer.