This is the 8988th most frequent Spanish word.
urbano
"Urbano" means "related to a city or town; urban."
In this sentence, the word 'urbano' is used as an adjective describing the type of 'desarrollo' (development), specifically referring to development related to or characteristic of a city or urban area.
El desarrollo urbano ha transformado la ciudad.
Urban development has transformed the city.
Here, 'urbana' is used as an adjective to describe the style of 'moda' (fashion), indicating a style associated with or inspired by city life.
La moda urbana es popular entre los jóvenes.
Urban fashion is popular among young people.
In this usage, 'urbana' as part of 'planificación urbana' refers to the planning related to the organization and strategy of urban or metropolitan areas.