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. A consumer in science refers to an organism, typically an animal, that feeds on other animals or plants. The consumer is part of the food chain and is studied in the science field known as ecology. Continue Reading.