Egypt and the Nile Valley civilizations were defined by the rich alluvial soils that annual floods deposited along the Nile banks and in the delta and the flood plains.
(Egypt and the Nile Valley civilizations; were defined; by the rich alluvial soils) (the rich alluvial soils; deposited; annual floods)
Egypt and the Nile Valley civilizations the rich alluvial soils
were defined deposited
by the rich alluvial soils
annual floods