C. Age structure. Hope I helped :) 
        
             
        
        
        
Answer:
0.500 T
Explanation:
Since the change in time and the number of coils are both 1, I set the problem up to be 1.3=(1.5(x)-13(x)). I then plugged in numbers for x until I got the answer to be 1.3 V.
 
        
             
        
        
        
Explanation:
Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage.
 
        
                    
             
        
        
        
The body system on the chart
        
             
        
        
        
Answer:
Sun............................