Final answer:
The branches of the ocean connect with the entire ocean at different locations such as the Subtropical Convergence. This mixing of waters supports the productivity of marine organisms. Additionally, early human populations may have followed the coastal route, relying on marine resources for survival.
Step-by-step explanation:
The branches of the ocean connect with the entire ocean at different locations depending on the context. In terms of marine conditions, the branches meet with the Pacific, Atlantic, and Indian Oceans at the Subtropical Convergence, where cold, dense waters from the Southern Ocean mix with warmer waters from the north. This zone of upwelling and mixing is conducive to high levels of productivity for organisms such as phytoplankton and krill. Additionally, the coastal route of migration suggests that early human populations followed the continental coastline southward, relying on marine resources like fish, shellfish, and sea mammals.
Learn more about connections between branches of the ocean and the entire ocean