Question

what could we do to destroy energy? reduce the output of power plants nothing transfer energy to a black hole

Explanation:

According to the law of conservation of energy, energy cannot be created or destroyed. It can only be transformed from one form to another. Reducing the output of power plants only changes the amount of energy available in a usable form but doesn't destroy energy. Transferring energy to a black hole just moves the energy to another location (the black - hole's gravitational field, for example) but doesn't destroy it.

Answer:

B. nothing