Fact 1: Biofuel is used to produce electricity by burning. Fact 2: Ethanol, a form of alcohol, is already the most common biofuel. Given the two facts above, a form of alcohol is used to produce electricity by what?
Options are: [i] reducing heat; [ii] burning; [iii] spreading seeds; [iv] sharing pressure; [v] deadly; [vi] drinking; [vii] consumers; [viii] Decibels;
[ii]