The verse "Then Job answered," from Job 12:1 simply indicates that Job is about to speak. It's a transition phrase, telling the reader that the dialogue is continuing, and specifically that Job is responding to something that was said previously. In the context of the Book of Job, it usually means he's responding to the arguments of his friends (Eliphaz, Bildad, and Zophar) who are trying to explain why he's suffering.
The verse "Then Job answered," from Job 12:1 simply indicates that Job is about to speak. It's a transition phrase, telling the reader that the dialogue is continuing, and specifically that Job is responding to something that was said previously. In the context of the Book of Job, it usually means he's responding to the arguments of his friends (Eliphaz, Bildad, and Zophar) who are trying to explain why he's suffering.