As per____________ "Economics is a study of man in the ordinary business of life. It enquires how he gets his income and how he uses it. Thus, it is on the one side, the study of wealth and on the other and more important side, a part of the study of man".
Alfred Marshall was a British economist who proposed the definition of welfare according to which economics is a science of creation of welfare for both human as well as society. Therefore, economics studies the ordinary business activities done by a man in daily life to generate wealth which is used to create welfare for both human and society.