You are presented with the question "what is cells converting oxygen and carbohydrates into carbon dioxide, water, and energy?" and the following answer choices: 
- not necessary for life
 - requirement for life
 - Most plants
 - one celled organisms
 - digestion
 - they body they live in
 - h2o
 - circulatory systems

Now knowing 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, choose the best answer.


 

  requirement for life       