Final answer:
The key difference is that energy bars have intrinsic value, making them commodity money, whereas Canadian dollars are fiat money with value backed by government authority.
Step-by-step explanation:
One important difference between using energy bars and using Canadian dollars as money is that energy bars have intrinsic value. Energy bars are an example of commodity money, which means they have value outside of their use as money. This contrasts with Canadian dollars, which are an example of fiat money. Fiat money has no intrinsic value and is backed by the government that issues it. It's accepted as money because the government maintains its value and the society using it agrees on its worth as a medium of exchange.