Fact 1: The surface of a beach is formed by mechanical weathering.

Fact 2: Water is a mechanical weathering force.

Given the two facts above, answer the question "the surface of a beach is formed by what force?" with the following options: 
- heat
 - Gravity
 - Rocks
 - water
 - wind
 - Pacific
 - kinetic
 - a wave


 

    water     