You are presented with the quiz "A person is what without cellular respiration?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cellular respiration is when a cell converts from oxygen and carbohydrates into carbon dioxide, water, and energy" and "without enough oxygen cell respiration is reduced, leaving a person tired and lacking in energy". 

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


 

     tired and lacking energy      