You are presented with the quiz "Receptors in the lining of the nose are:" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "smell is used for finding food by some animals" and "smell receptors, nerve tissue that picks up smells, are located in the lining of the nose". 

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


 

    used to find food       