Hey
Which is a reason the Nile has been called "the lifeblood" of Egypt?

Basically farming

Explanation:

During the annual flooding of the Nile, which typically lasted from July through November, farming was impossible. But when the waters receded, a thick layer of fertile silt over the farmlands remained to insure rich soil for their crops and thick grasses for their grazing animals

to inform the reader that the text will take a second look at the grimms’ original tales