photosystem 2, photosystem 1, pumping hydrogen..., and making NADPH
 
        
             
        
        
        
The lungs are considered to be an organ.
        
             
        
        
        
The control (choice A) I believe :)
        
                    
             
        
        
        
Answer:
Patchy Forest
Explanation:
The Patchy Forest  hypothesis about hominin bipedalism states that energy-efficient walking on two legs arose so that hominins could search for food that was dispersed as a result of climatic changes at the end of the Miocene.
I have also done this before!