Answer:
C, executive.
Step-by-step explanation:
There are three branches of government: the legislative, the executive and the juridical.
The legislative branch passes the laws, the executive branch carries them out and the juridical interprets them. This is the principal of separation of powers, done to prevent the concentration of power in the hands of a small group of people.
The mayor operates in the executive branch because he executes and carries out the laws passed by the legislative authority.