Final answer:
Fishermen enter their profession via the coastal route, following the continental coastline and relying on marine resources for sustenance.
Step-by-step explanation:
According to the information provided, fishermen enter their profession via the coastal route. This theory suggests that early migratory populations followed the continental coastline, relying on marine resources such as kelp, fish, shellfish, birds, and sea mammals for sustenance. Archaeological research supports the idea that these migrants may have traveled along the continental shelf and eventually reached as far south as Chile before exploring the interior lands.