You are presented with the quiz "Cells converting from oxygen and carbohydrates into carbon dioxide, water and energy is a requirement for what?" 

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 "cellular respiration is a requirement for life". 

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


 

    life       