You are presented with the question "What can keep a home warm?" and the following answer choices: 
- cellulose material
 - an electric stove
 - Movement of an air mass
 - plastic wrap
 - water
 - bubble tape
 - electricity
 - Animal fur

Now knowing that insulated material can be used for keeping warm and building insulation is a cellulose material made of ground computer paper and cardboard boxes, choose the best answer.


 

 cellulose material        