What is an intermodal train composed of?

An intermodal train is specifically designed to transport cargo using different modes of transportation without handling the cargo itself when changing modes. It is composed entirely of intermodal equipment, which typically includes containers and trailers that are seamlessly transferred between trucks, trains, and ships. This specialized equipment is designed to accommodate shipping containers, making intermodal trains efficient for moving goods over long distances.

The other options do not accurately reflect the nature of intermodal trains. A train consisting solely of passenger cars is dedicated to passenger transport, while a train made up only of freight cars caters to conventional freight. Additionally, a mix of passenger and freight cars would not qualify as an intermodal train, as that would imply dual-purpose operations rather than the focused logistical efficiency of intermodal shipping.