Assertion: narwhal's tusk | /r/ObjectUse | used for fighting
Facets:
Source sentences:
text: Tusks can be used for fighting and also have a role in sensing the environment, as they containing 10 million nerve endings.
text: The tusks might be used for fighting, hunting, or
text: Scientists believe that the tusks were used for fighting or as visual displays of the dominance of males to attract females; the tasks are mostly found in the male species.