A carrier in transportation is a person or company that transports goods or people by land, air, or sea. Carriers are an essential part of the logistics and transportation industry, as they are responsible for moving goods from one location to another. Some examples of carriers include trucking companies, airlines, and shipping lines. Carriers can specialize in certain types of cargo or transportation methods, such as hazardous materials, oversized loads, or refrigerated goods. They also use different type of vehicles such as trucks, planes, trains and ships. The choice of carrier can have a big impact on the cost and time of transportation. Carriers play a crucial role in supporting the global economy by allowing for the efficient movement of goods and people.