Final answer:
Ford Motor Company does not belong to the service sector; it operates in the manufacturing sector, producing and selling automobiles.
Step-by-step explanation:
The organization that does not belong to the service sector is b. Ford Motor Company. Costco is a membership warehouse club offering a range of consumer products, Southwest Airlines provides air transportation services, and the San Diego Zoo operates in the leisure and entertainment services industry. In contrast, Ford Motor Company is primarily involved in the manufacturing sector, specifically the production and sale of automobiles.