Insulated material can be used for keeping warm.
Building insulation is a cellulose material made of ground computer paper and cardboard boxes.
Cellulose material can be used to keep a home warm.
What can keep a home warm?
A: cellulose material
B: an electric stove
C: Movement of an air mass
D: plastic wrap
E: water
F: bubble tape
G: electricity
H: Animal fur