Fact 1: Sediment is formed by weathering.

Fact 2: Sedimentary rocks are made from sediment.

Given the two facts above, answer the question "Sedimentary rocks are formed by " with the following options: 
- a solute
 - calcite
 - weathering
 - graptolites
 - salinity
 - rainfall
 - movement
 - thrust


 

   weathering      