The ETC in the Chloroplast or Mitochondrion Gradually Lower the Energy

Multiple Choice

The ETC in the chloroplast or mitochondrion gradually lower the energy content of an electron as it passes from carrier to carrier, similar to the reduction in energy content of a

A) cannonball that reaches the high point of its flight and then returns to the ground.
B) bowling ball bouncing down a flight of stairs and landing temporarily on each step.
C) pair of sunglasses that intercepts ultraviolet radiation before it reaches your eyes.
D) recently baked pie cooling on the counter before it can be cut and eaten.