Answer:
A Suburban area
Step-by-step explanation:
Urban areas includes the main city while the suburban means the areas that surrounds the city. Urban areas are more contested as compared to suburban territories and have lower population density.
Suburbs can have their political jurisdiction e.g in US, but in United Kingdom they are under the administration of the cities. The suburbs emerged in 19th and 20th centuries as the development in road an rail transport made the travel to cities easier.
So we can say that Mr. Alvarez is lives in a suburb of San Francisco.