Which is the best analogy of a wave?
-a wave is like building a ramp.
-a wave is like shaking a hand.
-a wave is like water rippling in a pond.
-a wave is like knocking down a building.

The best analogy of a wave is C. a wave is like water rippling in a pond. These ripples are formed by winds usually, because when the wind is blowing, it moves the surface of the water in order to create these ripples, depending on the power of that wind. Similarly, waves are also formed by the activities of winds, so that is the correct analogy.

Not what goes around on earth but the universe too.

490 n  f=125n a=2.5m/s2