10 is 4 
11 is 3 
15 is 3 (where it says 3 ok)
        
             
        
        
        
I am not sure how to answer
        
             
        
        
        
They probably fall into the bacteria catagory
        
             
        
        
        
The answer is; negative…positive
In a closed circuit, electrons move from the negative  node to the positive node. Electric current, on the other hand, flows from the positive node to the negative node. The flow of electrons and electric current is measured in amperes (A).