Needs , wants and demands are the core concepts of marketing. These are basically inter related to each other which means needs which could be individualistic, social or physical arise due to a state of deprivation and have to be fulfilled for a basic human survival. Some human needs shaped by cultural and individual experiences and lifestyles take the form of wants. Ultimately demands are those sets of wants which are backed by the power to buy and could be related to many needs & wants. Other related concepts of marketing may include the Marketplace with exchange and the actual transaction as its base.   _{Your Comment}