Question

some gap is.left between.two section of bridge why

Answer 1

A gap is left between two sections of bridge because to allow thermal expansion during summer so that it will not damage the bridge.

Answer 2

Here is your answer mate ↙️↙️✅✅✅✅

Because These gaps provide beidge to expand and contract without these gaps the bridge may fall apart
Bridges are typically made of concrete and steel and these components are with high temperature and contract even at a low temperature.

Hope this helps you dude ✌️✌️✌️