In which context would you expect to find a couchette?

A couchette refers to a sleeping compartment or area on a train, specifically designed to allow passengers to rest comfortably while traveling overnight. This type of accommodation is commonly found on European trains, especially those that operate on long routes, where passengers may need a way to sleep during their journey. Couchettes typically consist of reclining seats that can accommodate multiple passengers and are equipped with bedding for comfort.

In the context of the other options, couchettes do not exist in the same format. Intercity buses typically provide standard seating without specialized sleeping arrangements. Long-haul flights may offer reclinable seats or lie-flat beds in premium cabins, but these are not referred to as couchettes. Cruise ships operate state rooms or cabins for overnight accommodations, but they do not feature couchettes either. Therefore, the presence of couchettes is uniquely associated with the train travel experience in Europe, making this the most appropriate context among the given options.