Fact 1: Stalactites are formed by deposition.

Fact 2: Small stalactites predominate on the cave roof.

Given the two facts above, answer the question "what is formed by deposition?" with the following options: 
- h2o
 - oceans
 - Sediment
 - soft soil
 - calcite
 - clouds
 - cave roofs
 - Sand dollars


 

       cave roofs  