Water and ATP energy
where carbon dioxide is a waste product and is released into the atmosphere.
        
             
        
        
        
The mitochondria converts food into energy
        
             
        
        
        
Since this is movement that is occurring against the natural movement from high to low concentration, this is Active transport. 
The option C.
        
                    
             
        
        
        
Answer:
A. Rock pieces
Explanation:
Abrasion is the breaking down and wearing away of rock material by the mechanical action of other rocks. Three agents of physical weathering that can cause abrasion are moving water, wind and gravity. None of those are agents of abrasion. But Rock pieces are a result of abrasion.