Answer:
b. owed their lord labor services.
Explanation:
Can you provide the options?
Answer: The adjective "medieval" (or sometimes "mediaeval" or "mediæval"), meaning pertaining to the Middle Ages, derives from medium aevum. Medieval writers divided history into periods such as the "Six Ages" or the "Four Empires", and considered their time to be the last before the end of the world.
Explanation:
A physical change chamges the substances apperance, but a chemical changes the chemical formula of a substance. Hope this helps!