Q: Fact 1: Electron transport is the final stage of aerobic respiration. Fact 2: Electron transport is like a waterfall. Given the two facts above, transport like what is the final stage of aerobic respiration?

Available options:
(1). kinetic
(2). a mountain
(3). Chemical energy
(4). a plane
(5). Energy.
(6). Energy
(7). a bus
(8). a waterfall
The answer is:
(8).