How can heat be kept?
an electric stove exposed material insulated material hydration permeable material electricity wet material In the winter
A B C D E F G H
Sunlight heats the ground, warming it up.
Insulated material can be used for keeping heat.
How can heat be kept? (A) an electric stove (B) exposed material (C) insulated material (D) hydration (E) permeable material (F) electricity (G) wet material (H) In the winter