You are presented with the quiz "Members of the Apoda order can be found in _." 

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 belong to the order Apoda or Gymnophiona". 

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


 

        streams in tropical regions   