Avalley is formed by a river flowing, and examples are Napa Valley and Sonoma Valley. Given these facts, what were formed by a river flowing among the following options:
- Statue of Liberty
 - body water
 - swamp vegetation
 - Rockies
 - Napa and Sonoma
 - clouds
 - Sediment
 - Calcium carbonate


 

     Napa and Sonoma    