Air cargo, commonly known as air freight, is collected by firms from shippers and delivered to customers. Aircraft were first used for carrying mail as cargo in 1911. Eventually manufacturers started designing aircraft for other types of freight as well.
A consumer is  a person or organization that uses economic services or commodities. In economic systems consumers are utilities expressed in the decision to trade or not.
Consumer (food chain) Consumers are organisms of an ecological food chain which receive energy by consuming other organisms. These organisms are formally referred to as heterotrophs, which include animals, bacteria and fungi. Such organisms may consume by various means, including predation, parasitization, and biodegradation.