Answer:
A: Ziggurats were built on high platforms to keep them safe from floods.
D: Much of life in a Sumerian city centered on the ziggurat.
Under manorialism, the obligation of the lord was to the serfs education, protection, food, shelter. Hence all of these were the obligation of the lord was to the serfs.
Manorialism was the economic model that existed during Feudalism. It was premised on the manor - the lord's home - and all the surrounding regions.
The manor system was founded on a set of obligations and rights shared by the lord and his serfs. The lord provided housing, farmland, and safeguards from bandits for his serfs. In exchange, the serfs did tend the lord's land, cared for his animals, and assisted in the upkeep of the manor.
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The largest internal organ in the body is the liver.
