Fact 1: Wind and rain cause erosion.

Fact 2: Abrasion is particle by particle erosion.

Given the two facts above, answer the question "what do wind and rain cause?" with the following options: 
- coastlines
 - flooding
 - windmills
 - heat energy
 - Pollution
 - ice
 - tornadoes
 - abrasion


 

        abrasion 