Question

how will you show that fluids exert friction on a body​

Answer 1

Answer:

Similarly, water and other liquids exert force of friction when objects move through them. ... So we can say that fluids exert force of friction on objects in motion through them. The frictional force exerted by fluids is also called drag

Explanation:

Answer 2

$\large\mathbb{\underline\purple{ANSWER}}$

when we start moving inside the fluid (liquid or vapour or both), we feel backword drag. This backword drag opposes our motion inside the fluid, so the force we exert is reduced, which we experience. This backword drag is frictional force of fluid.