Explanations:The Yamuna River is a significant river in India and is considered the lifeline of Delhi. The Yamuna is a major tributary of the Ganga River and flows through the city of Delhi, providing water for various purposes including drinking, irrigation, and industrial use. Historically, the Yamuna has played a crucial role in the development and sustenance of Delhi, which has been a major urban center for centuries.
The Yamuna River originates from the Yamunotri Glacier in the Himalayas and flows through several states before reaching Delhi. In Delhi, the river is a focal point for many historical and cultural landmarks, including the Purana Qila, the Qutub Minar, and the Taj Mahal in Agra, which is located downstream. The river has been a source of inspiration for poets and artists and is deeply embedded in the cultural and religious practices of the region.
Ecologically, the Yamuna supports a diverse range of flora and fauna. It is home to various species of fish, birds, and other wildlife. However, the river faces significant challenges due to pollution and over-extraction of water, which has led to various conservation efforts to protect and restore the river's health.
While other rivers like the Ganga, Sutlej, and Tapti are important in their respective regions, they do not flow through Delhi and thus are not considered the lifeline of the city. The Ganga flows through northern India, the Sutlej is a major river in Punjab, and the Tapti is located in western India. Therefore, the Yamuna is the correct answer as it is the river that flows through Delhi and is considered its lifeline.