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.
Quick Answer. Consumers are organisms that receive all their energy by consuming other types of organisms or organic matter. Generally consumers prey on other organisms because they do not have the ability to produce their own energy or to obtain energy through inorganic sources.