The answer is destructive force. Constructive force is the force that makes or forms the mountains and other features. Superposition forces are topics to be discussed in theories in <span>physics and systems and may not be applicable here. Unnatural is just an unusual choice. </span>
Well to find this out you need to make an equation
s+7=j So for example if Johnny's sister is 15 then Johnny would be 22 because s(sister's age) +7(number of years difference between their ages)=22(Johnny's age)
