Fact 1: Caecilians can be found in moist soil near rivers and streams in tropical regions.

Fact 2: Caecilians are primitive amphibians that resemble earthworms.

Given the two facts above, answer the question "what can be found in moist soil near rivers and streams in tropical regions?" with the following options: 
- the sun
 - bioaerosols
 - swamp vegetation
 - gravity
 - land fish
 - primitive amphibians
 - peachleaf willow
 - Most plants


 

      primitive amphibians   