Answer:
a. The river provides fertile soil for farming.
Step-by-step explanation:
Question - Why do so many of the people in India live in the Ganges River Valley?
Solution -
The correct option is - a. The river provides fertile soil for farming.
Reason -
The Ganges River has become a source of life for people who are living in its basin.
They rely on the river for their daily needs such as drinking water supplies and food and for irrigation and manufacturing.