Question

why did early human civilization flourish along the river valleys

Answer 1

human civilization those days made or produced their own food thus the water availability. river valleys also had soil rich in minerals and humus. animals come to drink water to river ths gives them animal to eat.

Answer 2

Explanation:

The first civilizations appeared in major river valleys, where floodplains contained rich soil and the rivers provided irrigation for crops and a means of transportation.