Question

Water in the waterfall flows from a higher level to the lower level because of

Answer 1

Hey there !

Water flows from higher level to lower level because it accelerates in whatever direction reduces its total potential energy as quickly as possible. Water will flow from higher energy head to lower energy head.

Hope it helps you !

Answer 2

because inside the earth there are 3 layers :
1): Crust
2): Mantle
3): Core

and by these layers, Gravity is produced and Water flows higher to lower....

hope it helps a lot