Which of these is the best example of erosion? A Wind carries sand from one side of a beach to the other. B A flowing river wear
s down the edges of rocks so they feel smooth. C An earthquake causes a fault line to appear in the ground. D Ocean waves cause rocks to break down into sand.
Because Earth's gravitational pull is so strong, we do not notice the pull from other objects. Earth's gravity pulls everything to the center of Earth and prevents us from flying off into space