Which phrase provides the best definition of mass movement?

Hi hope this helps

~ the movement of material caused by erosion

~the slow flow of a glacier as it moves through the valley of a mountain

~ the movement of large amounts of soil and rock debris down a slope

~ the fast movement of a boulder rolling down a slope

-The movement of large amounts of soil and rock debris down a slope-

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds