Fact 1: Stalactites are formed by deposition.

Fact 2: Stalactites and stalagmites are common speleothems.

Given the two facts above, answer the question "What are speleothems formed by?" with the following options: 
- calcite
 - craters
 - deposition
 - tornadoes
 - deuterostomes
 - tiny polyps
 - haploid plants
 - hurricanes


 

   deposition      