the controlled variables are, timing of adding ice, water used, and amount of sugar. the dependant variables are, daily temperature, and amount of lemon juice. the independent variable is, number of glasses sold. hope it helps
please mark brainlyist
 
        
             
        
        
        
Its "C" because the earth only has a certain amount of oil but yet we have endless amount of sun, solar, and wind 
        
                    
             
        
        
        
Pretty sure the answer is potassium. Hope that helps:)
        
             
        
        
        
Answer:
High mass stars have very high-core temperatures, crushing stellar-core pressures, and are very big and very bright.
Explanation: