You are presented with the quiz "what can be found in moist soil near rivers and streams in tropical regions?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "caecilians can be found in moist soil near rivers and streams in tropical regions" and "caecilians are primitive amphibians that resemble earthworms". 

So, what's the best answer to the question?


 

      primitive amphibians     