In the following question, four words are given in the bold. One of these words given in bold may be wrongly spelt or inappropriate in the context. Find out the word. If the words are correct, choose 'All correct' as the answer.

Abandoned by their owners, (1)/ dogs may revert (2)/ to their faral state, (3)/ roaming the woods in packs.(4)/ All are correct (5)