Threatening behavior by predators causes a porcupine to extend its quills.
Fishers are one of the few specialized predators on porcupines.
A porcupine will extend it's quills when a fisher displays threatening behavior.
What will a porcupine do when it feels a fisher is displaying threatening behavior?

[1] bite the fisher
[2] decreases its bodily water
[3] Change colors
[4] extend it's quills
[5] kill them
[6] the body's largest organ
[7] back away
[8] fight the fisher