Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
동물의 영역성은 그들의 생존에 중요한 역할을 한다.dongmul-ui yeongyeokseong-eun geudeul-ui saengjon-e jungyohan yeoghal-eul handa.The territoriality of animals plays an important role in their survival.