Fact 1: Biofuel is used to produce electricity by burning.

Fact 2: Any green plant can be considered for use in the production of biofuel or bioenergy.

Given the two facts above, answer the question "What can a plant be used to produce when it's burned?" with the following options: 
- toxins
 - energy
 - sun's heat
 - carbon dioxide
 - kinetic energy
 - heat energy
 - adding heat
 - Electricity


 

        Electricity 