Fact 1: Biofuel is used to produce electricity by burning. Fact 2: Biofuels include ethanol, methanol, biodiesel, biocrude, and methane. Given the two facts above, what produces electricty by burning?

Options are:
a). cactuses.
b). ethanol.
c). engines.
d). cigars.
e). organisms.
f). cigarettes.
g). Conifers.
h). ferns.
Answer:
b).