Final answer:
A carrier in a contract of carriage is responsible for the transportation of goods or passengers, which can be through different modes like rail, road, sea, air, or a combination. Carriers can either transport the goods themselves or hire others to do so. The historical context provided does not relate to modern transportation contracts.
Step-by-step explanation:
The person or entity described in the question is typically known as a carrier. In the context of a contract of carriage, a carrier is responsible for the transportation of goods or passengers from one place to another. This can be accomplished through various modes of transportation, including rail, road, sea, air, and inland waterways.
Additionally, a carrier might use a combination of these methods to complete the carriage contractually agreed upon. The carrier can either perform the transportation themselves or procure the performance by hiring other organizations or individuals to transport the cargo or passengers.
The quoted text referring to persons held to service or labor refers to an older legal context, specifically from the United States Constitution's Fugitive Slave Clause, which has historical significance but is not directly related to modern contracts of carriage.