You are presented with the quiz "If most reptiles have bad eyesight, the ability to smell is what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most reptiles have good eyesight and a keen sense of smell" and "if someone has bad eyesight,the sense of smell is heightened". 

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


 

       heightened    