Fact 1: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants.

Fact 2: Ethanol qualifies as an alternative fuel.

Given the two facts above, answer the question "What can be used as an alternative fuel?" with the following options: 
- Toyota
 - Energy
 - corn
 - soap
 - space
 - CO 2
 - stone
 - Trees


 

   corn      