•Humans (biosphere) built a dam out of rock materials (lithosphere). Water in the lake (hydrosphere) seeps into the cliff walls behind the dam, becoming groundwater (lithosphere), or evaporating into the air (atmosphere).
 
        
                    
             
        
        
        
Answer:
Wastewater treatment
Explanation:
The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment. As solid material decays, it uses up oxygen, which is needed by the plants and animals living in the water. 
 
        
             
        
        
        
The 6th planet from the sun is Saturn. Here is a picture of all of the 8 planets from the sun.
 
        
        
        
The outer core is more thinner than the inner core. outer core is also more rocky in material.
        
             
        
        
        
Answer:
C. GDP decreases for a couple of years before starting to increase.
Explanation: