Assertion: porcupine | /r/CapableOf | roll into ball
Facets:
value: as protection against predators
type: PURPOSE
value: in danger
type: MANNER
Source sentences:
text: When in danger, the hedgehog rolls into a ball so that the quills cover the entire area of their exposed body and protects the animal from predators, according to National Geographic.
text: If threatened, Hedgehogs can roll up into a ball as protection against predators.
text: If caught, the porcupine rolls into a ball.
text: The going is slow and the porcupine will roll up in a ball if it feels threatened, leaving just a shroud of spines to contend with.
text: A hedgehog rolled into a ball.
text: Hedgehogs have a unique defense system where they roll into a ball and keep still in the face of danger.
text: Behaviorally, the porcupine detaches the quills of the tail in such a way that they stick into the predator while the hedgehog rolls up into a ball and his quills avoid the predatory attack.