I believe that the message the author is trying to convey in this excerpt is that humans need to take action to end further destruction of the natural environment, because if they don't, more and more species will disappear.
Its the 1st option (Adult to register.....)
Willy hopes that Biff will make something of himself, yet Biff drifts from job to job without any ambition in life. He used to work as a shipping clerk but he stole basketballs from his boss. He once spent three months in jail because he stole a suit. He failed Math so he did not graduate from high school. Now Biff works in cattle ranches and farms. At his age of 34 he should already have a wife and family and a steady job yet he just wanders from one place to another looking for jobs.