As this mechanical energy is associated with height, it would be "Potential Energy" in particular.
U = mgh
U = F.h
U = 1.5 * 4
U = 6 Joules
So, 6 J of energy is lost before it hits the ground.
Hope this helps!
Choices 'B'; and 'D' both begin with the correct words.
But they should end with the equation
R = V / I
The answer is D, the amount of energy stays the same.