This is the 1099th most frequent French word.
administrative
Relating to the management and organization of tasks or activities.
In this sentence, 'administrative' is used as an adjective qualifying the noun 'division', indicating that the division pertains to administration or organizational structures.
La région a une division administrative complexe.
The region has a complex administrative division.
Here, 'administratif' agrees with 'bureau', describing it as related to administration tasks or functions.
Elle travaille dans un bureau administratif.
She works in an administrative office.
In this instance, 'administratives' is the plural feminine form referring to tasks, indicating their nature as pertaining to administrative duties.