Amarket researcher focuses on the psychological process, including thoughts, feelings, and behavior that people experience once they realize that they have an unmet need. the human behavior that constitutes this set of value-seeking activities that the researcher is examining is best described as

The human behavior that constitutes this set of value-seeking activities that the researcher is examining is best described as consumer behavior. Consumer behavior is term used in marketing to describe set of value-seeking activities that take place as people go about addressing realized needs. It includes how consumers behave individually and in groups , how a customer feels directly before buying a product,when consumers are most likely to make a purchase , why consumer behavior patterns change based on the types of products and services they purchase  etc.

answer; the changing age structure of the population;