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.
What is Consumer Behaviour - Meaning and Important Concepts. Before understanding consumer behaviour let us first go through few more terminologies: Any individual who purchases goods and services from the market for his/her end-use is called a consumer. In simpler words a consumer is one who consumes goods and services available in the market.