Question

explain how streamline shape reduces drag​

Answer 1

Explanation:

With a streamlined shape, the area of the body that pushes air/water becomes very small. It kind of pierces through the air/water because of the small area that is pushes the air/water while traveling through it. So the air/water that needs to be pushed reduces which means less air/water to push

Answer 2

The more streamlined an object by elongating its rear surface, the more you reduce the size of its wake and the result is the pressure drag

Conclusion
Streamlining increases friction DRAG..