Question

What is streamlining and how is it useful

Answer 1

meaning:
design or provide with a form that presents very little resistance to a flow of air or water, increasing speed and ease of movement.
Uses:
Streamlining. Streamlining, in aerodynamics, the contouring of an object, such as an aircraft body, to reduce its drag, or resistance to motion through a stream of air. ... Streamlining, then, is the contouring of an aircraft or other body in such a way that its turbulent wake is reduced to a minimum.

Answer 2

The property of the bodies of some animals and transporters which help them to minimise air resistance and reduce energy required to propel against air or water is called streamlining. It is useful to reduce the friction or pressure exerted by fluids.