What does the law of energy conservation say? A. Energy can be transformed
B. The form of energy is always conserved
C. Energy is the same everywhere
D. Energy is always conserved

D. Energy is always conserved

Explanation: The law of energy conservation says that energy is neither created or destroyed, that it is only transferred or transformed from energy. "Conserved" means to maintain a constant overall total, which ties directly into the law of conservation (Energy can't be created nor destroyed, it can only be transferred or transformed from one form to another).

i would think it's food chain

connect the batteries in series and hope