What is common to the places known as Aliyar, Isapur and Kangsabati?

The correct option is Water reservoirs.

Let us analyze the three locations mentioned in the question:

1. Aliyar: Located in the Coimbatore district of Tamil Nadu, India, Aliyar is famous for the Aliyar Reservoir (and Dam) located near Pollachi, constructed across the Aliyar River as part of the Parambikulam Aliyar Project.

2. Isapur: Located on the border of Yavatmal and Nanded districts in Maharashtra, India, Isapur is home to the Isapur Dam built on the Penganga River, which forms a major water reservoir in the region.

3. Kangsabati: Located in West Bengal, India, the Kangsabati Reservoir (or Mukutmanipur Dam) was constructed across the Kangsabati and Kumari rivers to store water for irrigation and flood control.

Therefore, the common feature binding Aliyar, Isapur, and Kangsabati is that they are all major water reservoirs in India.