The correct answer is: a) Ecological restoration.
The Kali Bein river is a tributary of the Beas River in Punjab, India. It is known for its ecological restoration, which has been a major success story in recent years. The river was once heavily polluted and had almost dried up, but thanks to the efforts of local communities and the government, it has been brought back to life. The Kali Bein is now a thriving ecosystem, home to a variety of plants and animals. It is also a popular spot for recreation, such as fishing and swimming.
The other options are incorrect for the following reasons:
- b) Scenic beauty: The Kali Bein is not particularly known for its scenic beauty. It is a relatively small river that flows through a rural area.
- c) Historical significance: The Kali Bein does not have any significant historical significance.
- d) Abundant fish population: The Kali Bein does not have an abundant fish population. In fact, the river was once so polluted that it was not safe for fish to live in. However, thanks to the ecological restoration efforts, the fish population is now slowly recovering.