Threatening behavior by predators causes a porcupine to extend its quills.
Fishers are predators that can eat porcupines.
A threatening behavior by a fisher can make a porcupine extend its quills.
What might a porcupine do if threatened by a fisher?
(A) dig in the dirt
(B) Decrease bodily water
(C) killing insects
(D) lower its quills
(E) kill them
(F) humans disturb it
(G) show its teeth
(H) show its quills