You are presented with the question "Production of ethanol is dependent  on " and the following answer choices: 
- the environment
 - the sun's energy
 - rubbing alcohol
 - Movement of an air mass
 - Rayleigh scattering
 - agriculture
 - heat produced
 - vinegar

Now knowing that ethanol is produced by alcoholic fermentation of the glucose in corn or other plants and plants use the sun's energy to transform carbon dioxide gas and water into a sugar called glucose, choose the best answer.


 

  the sun's energy       