Answer: Scientific observation 
Explanation:
The reason for this is, Ben is observing the plants, coming up with questions.
 
        
                    
             
        
        
        
Answer:
the dependant is the water the independant is the mass i think
Explanation:
 
        
             
        
        
        
The point at which the sun crosses the <span>equator to make night and day the same length during the second time of the year is an equinox.</span>
        
                    
             
        
        
        
I think the correct answer from the choices listed above is option A. It is the alveoli that is composed of single layer <span>surrounded by a network of capillaries. These are used to allow oxygen and carbon dioxide to move from the lungs to the bloodstream.</span>