Final answer:
The correct word pairs linking descriptors to oceanic life zones are Pelagic with Open water, Benthic with Deep sea, and Intertidal with Shoreline.
Step-by-step explanation:
The word pairs that correctly link a descriptor with the way in which the organism lives in the ocean are: a) Pelagic - Open water, which refers to organisms living in the open sea away from the sea bottom; b) Benthic - Deep sea, which includes organisms living at the bottom of the ocean on or in the sediment; and c) Intertidal - Shoreline, which pertains to organisms living in the area that is above water at low tide and under water at high tide. Each of these terms is associated with specific zones within the marine environment that host distinct communities of organisms adapted to those conditions.