Answer: a place where land meets an ocean
Step-by-step explanation:
A wide, flat area of land is referred to as a plain.
A high, rolling area of land is referred to as a plateau.
A place where land meets an ocean is refered to as the coastline or seashore.
An area of land surrounded by water is referred to as an island.
Therefore, with regards to the explanation above, the answer to the question is option C.