Final answer:
A real estate broker recognizes market segmentation when they focus on a particular type of property or zone of a city.
Step-by-step explanation:
When a real estate broker builds a business focusing on a particular type of property or a zone of a city, the broker is recognizing market segmentation. Market segmentation refers to the division of a market into smaller groups based on similar characteristics or needs. By specializing in a specific type of property or zone, the broker can better cater to the needs and preferences of the target market.