You are presented with the question "Amphibians have what sort of sensing system?" and the following answer choices: 
- strong
 - retina
 - four limbs
 - chemical
 - mechanical
 - the eyes
 - nerves
 - heat or cold

Now knowing that amphibians have sense organs to smell and taste chemicals and smell and taste belong to our chemical sensing system, choose the best answer.


 

    chemical     