Fact 1: Weathering means breaking down rocks from larger whole into smaller pieces by weather.

Fact 2: Erosion breaks the rock down again, and the cycle continues.

Given the two facts above, answer the question "What means that rocks are eroded down again?" with the following options: 
- flooding
 - rainfall
 - salt and water.
 - weathering
 - freezing
 - chilling
 - frosting
 - mines


 

    weathering     