Why do you think nylon is used in making fishing nets?
It looks good.
It is cheap.
It is resistant to wrinkles.
It has high strength and elasticity.
Nylon is used in making fishing nets because it has high strength and elasticity.
Assertion : Nylon is better than rayon.
Reason : Nylon fibres are stronger, have good elasticity and no wrinkling takes place in nylon.