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

Fact 2: Wood and straw are both examples of biofuels.

Given the two facts above, answer the question "What can be done to wood and straw to produce electricity? " with the following options: 
- massive damage
 - It can be crushed
 - adding heat
 - It can be burned.
 - matter vibrating
 - It can be boiled
 - Plant growth is reduced
 - it can be chopped


 

    It can be burned.     