Question

Why it is more difficult to walk on a sandy road than on a concrete road?
a) The friction between sand and feet is less than that between concrete and feet.
b) Sand is soft and concreter is hard.
c) The friction between sand and feet is more than that between concrete and feet.
d) The sand is grainy but concrete is smooth.

Answer 1

i think option B is answer

Answer 2

The friction between sand and feet is less than that between concrete and feet. is the answer.