Concept:A tramp is a cargo ship without a fixed route or schedule.
Explanation:A tramp ship moves from port to port in search of available cargo.
It has no fixed timetable or regular route.
It is usually chartered to carry goods whenever and wherever a need arises.
This makes it flexible and responsive to market demand.
In contrast, liners operate on fixed routes and schedules.
Tankers carry liquid cargo like oil, and ferries carry passengers or vehicles on short routes.
Therefore, the ship that travels without a fixed schedule to find cargo is a tramp.
Answer:C. tramp