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, answer the question "what produces electricty by burning?" with the following options: 
- cactuses
 - ethanol
 - engines
 - cigars
 - organisms
 - cigarettes
 - Conifers
 - ferns


 

  ethanol       