You are presented with the quiz "What plant processes convert carbon dioxide, water and solar energy into carbohydrates?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "photosynthesis means producers convert from carbon dioxide, water, and solar energy into carbohydrates for themselves" and "photosynthesis and cellular respiration are life-sustaining plant processes". 

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


 

  life-sustaining         