Question

why river are regarded as the lifeline of human civilizations

Answer 1

The rivers are of great use in our life. Example: for agriculture, for power plants, for our daily requirementsand also indirectly helpful to industrialist

Answer 2

River are regard as the life of human civilization :-

it has always been an important source for humans.

Humans settled on the banks of rivers.

From the water of river farmer use to do farming

Fisherman earn their livelihood by selling fish (fish from the river)

Villages and towns get water from the river for household purpose or for drinking

.....etc