Question

imagine what difficulties there would be if the bridge was not there?

Answer 1

without a bridge there would have been a lot of difficulties. A bridge connects two different places and without it the places would be either inaccessible or more time taking to reach. Also in bad weather the places would be not connected in absence of bridge. bridge facilitate easy transportation but in absence the transport system would face many difficulties.thus, bridges are an essential part of our economy and thus they are important.

Answer 2

we would not be able  to go anywhere because bridge is something that gives us access to cross from one side to the other side .
if there is a river and we want to cross from one side to another side , and if there would not be a bridge , then we have to go in different situations like going in a boat .