Why are boomerangs traditional used in aboriginal culture

to hurt
to tell stories
to make music
to be a movement prop

The correct answer is to hurt. 

Traditionally, boomerangs were used in Aboriginal culture for hunting purposes to kill prey. Boomerangs can successfully hit targets hundreds of meters away. Indigenous Australians traditionally used boomerangs to hunt and successfully kill kangaroos for their meat. Besides hunting, boomerangs are also traditionally used for entertainment and musical purposes.