Birdwatching is a popular ecotourism activity in:

Harike Wildlife Sanctuary
Kandi Region
Kalesar National Park
All of the above

The correct answer is: d) All of the above.

Birdwatching is a popular ecotourism activity in Harike Wildlife Sanctuary, Kandi Region, and Kalesar National Park. These are all areas with a high diversity of bird species, making them ideal for birdwatchers.

Harike Wildlife Sanctuary is a wetland area located in the state of Punjab, India. It is home to a variety of birds, including flamingos, pelicans, and herons. The sanctuary is also a popular spot for migratory birds.

The Kandi Region is a hilly area located in the state of Haryana, India. It is home to a variety of birds, including pheasants, partridges, and doves. The region is also a popular spot for migratory birds.

Kalesar National Park is a national park located in the state of Haryana, India. It is home to a variety of birds, including peacocks, hornbills, and kingfishers. The park is also a popular spot for migratory birds.

Birdwatching is a great way to enjoy nature and learn about the different birds that live in our world. It is also a relatively low-impact activity that can be enjoyed by people of all ages. If you are interested in birdwatching, I encourage you to visit one of the many birdwatching hotspots in India.