What can be used for keeping warm?
keratin vacuum four limbs energy cold engines magic heat
A B C D E F G H
Carpet beetle larvae feed on the keratin and chitin commonly found in wool, fur, or feathers.
keratin can be used for keeping warm
What can be used for keeping warm? (A) keratin (B) vacuum (C) four limbs (D) energy (E) cold (F) engines (G) magic (H) heat