Insulated material can be used for keeping warm, and building insulation is a cellulose material made of ground computer paper and cardboard boxes. Given these facts, what can keep a home warm among the following options:
- cellulose material
 - an electric stove
 - Movement of an air mass
 - plastic wrap
 - water
 - bubble tape
 - electricity
 - Animal fur


 

 cellulose material        