The correct answer is C. Quay : Ship.
A platform is a raised area alongside a railway track, where trains stop to load and unload passengers and cargo. An aerodrome is an airport, a place where aircraft can take off and land. A hotel is a building where people can stay overnight, typically paying for a room. A footpath is a path for pedestrians, typically made of concrete or asphalt.
A quay is a structure alongside a body of water, such as a river or sea, where ships can dock and unload cargo. Ships are typically loaded and unloaded using cranes or other lifting equipment. Quays are often used for commercial purposes, such as loading and unloading cargo ships, but they can also be used for recreational purposes, such as fishing or swimming.
The other options are incorrect because they do not accurately describe the relationship between the two terms. For example, a hotel is not a place where aeroplanes stop to load and unload passengers and cargo.