Mitochondria are involved in cellular respiration, where they produce adenosine triphosphate (ATP). ATP is the cells energy carrier or the cells energy store molecule. 
        
             
        
        
        
Answer:
D) Habitats for animals.
Explanation:
 It depends what the question means when it says 'the changing of the rivers'. I took it as the rivers are changing size and becoming more spread out. In that case, I chose habitats.
 The more water there is, the more habitat there is for sea life.
 All in all, the correct answer is D).
 
        
             
        
        
        
The answer is True. Hope this helps.
        
                    
             
        
        
        
It is the repiratory and the circulatory