Final answer:
Castles served as defense structures, residences for royalty and nobility, and symbols of power and wealth in medieval society.
Step-by-step explanation:
Castles served various purposes in medieval society. Some of the main purposes included defense, residence for royalty and nobility, and as symbols of power and wealth. Defense was a primary function of castles, as they were designed with features such as thick walls, towers, and moats to protect against attacks. Castles also served as the residences of royalty and nobility, providing them with shelter, privacy, and luxury. Additionally, castles were symbols of power and wealth, serving to demonstrate the prestige and status of their owners.
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