Вместо многоточия необходимо вставить слово: 1) Believed to be an ancestor of domestic dog, the wolf is…

Вместо многоточия необходимо вставить слово: 1) Believed to be an ancestor of domestic dog, the wolf is generated (1) … a highly intelligentanimal. Wolves travel in packs and their territory can be anywhere (2) … 40 to 400 square miles. As well as marking the borders of their territory with scent, they (3) … other wolves know they are around by barking and howling.