Answer:
The question seems to be asking about a west-flowing river that serves as a source in a particular region. Without specific context, it's challenging to pinpoint a single answer, as many regions around the world have west-flowing rivers that serve as important sources of water.
However, one example could be the **Narmada River** in India. The Narmada River flows westward and is one of the major rivers of central India. It originates from Amarkantak Hill in Madhya Pradesh and flows westward through the states of Madhya Pradesh, Maharashtra, and Gujarat, before emptying into the Arabian Sea. The Narmada River is known for its significant role in the region's ecosystem, agriculture, and culture.
If you have a specific region or area in mind, providing more details would help in giving a more accurate answer.
