You are presented with the question "what is formed by deposition?" and the following answer choices: 
- calcite
 - coral reefs
 - h2o
 - oxygen
 - sandstones
 - soft soil
 - clouds
 - Sand dollars

Now knowing that sedimentary rocks are formed by deposition and sandstones are another type of sedimentary rocks used in buildings, choose the best answer.


 

     sandstones    