porcupine can use its quills as a what
encoded information threatened defense mechanism cushion protective bony armor cleaning mechanism if humans disturb bears brush
A B C D E F G H
Porcupines only inflate and extend their spines as a defense mechanism.
porcupine can use its quills as a defense mechanism
porcupine can use its quills as a what (A) encoded information (B) threatened (C) defense mechanism (D) cushion (E) protective bony armor (F) cleaning mechanism (G) if humans disturb bears (H) brush