A governmental function is an activity that embodies sovereign authority and public policy, inherently limited to government hands. These are non-delegable powers that involve enforcing laws, maintaining public order, taxation, and other core public duties. Because they rely on the government’s unique authority, private entities cannot perform them as a substitute. In contrast, a proprietary function is a private-sector activity carried on for profit and competition with private industry. A ministerial act is a straightforward, rule-based task performed in a prescribed manner with little or no discretion, which can be carried out by government personnel or contractors under proper authorization. An administrative act involves applying laws or policies within a bureaucratic process and may entail some discretion; it can be carried out by government agencies or under contract with private entities, but it is not inherently exclusive to government. Therefore, the act that can be performed only by government is a governmental function.

The main concept is identifying who is described as the party in the business of moving goods for others. A carrier is precisely that: a person or organization that transports property for hire, such as a trucking company, airline, railroad, or shipping line, under a contract of carriage. In property insurance terms, a carrier has the duty to exercise due care while the goods are in transit and can be liable for loss or damage that occurs during transport, subject to policy terms and coverage. Bailment refers to the relationship created when someone delivers possession of property to another for a specific purpose, with duties of care on the bailee, but it is about the relationship itself rather than the entity that transports goods. A warehouse receipt is a document acknowledging storage of goods in a warehouse and may function as proof of storage or title, not the transport entity. A bill of lading is a document that serves as a contract of carriage and a receipt for goods, and often as a document of title, but it describes the agreement and evidence of shipment rather than defining the transporter’s business.

A breach of contract occurs when one party fails, without a legal excuse, to perform a promise made in a contract. The contract is simply the agreement itself, while standing to sue concerns who has the right to bring a claim, and a final order is a court’s ruling. The term that best describes the act of not fulfilling the promise is breach of contract, which can be either material or minor depending on the extent of nonperformance.

The concept being tested is how some currencies are kept at a fixed value relative to another country's currency. A pegged currency describes this arrangement, where the domestic currency is anchored to a foreign currency at a set rate, and the central bank intervenes—by buying or selling its own currency—to maintain that rate within a narrow band or exactly at the fixed value. For example, a country might peg its currency to the U.S. dollar to stabilize trade and inflation. The other terms don’t fit because they refer to different concepts: transfer price is about pricing between related entities for internal transactions, not exchange-rate policy; a tax haven is a jurisdiction with favorable taxes, unrelated to currency fixing; and bearer share is a type of stock ownership with ownership evidenced by possession of the share certificate, also unrelated to currency valuation.