Why did egypt’s main crops of papyrus and cereal best contribute to the development of civilization

Papyrus and cereals were very important commodities in Egypt in the ancient times because it provides both as a food and trading source. During those days trade made civilizations possible and expansion of agriculture became a necessity.

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the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.