Explanation

Option D is correct: Aliyar, Isapur, and Kangsabati are all prominent water reservoirs (irrigation dam reservoirs) in India:

– Aliyar Reservoir: Located near Pollachi in the Coimbatore district of Tamil Nadu, constructed across the Aliyar River as part of the Parambikulam Aliyar Project.
– Isapur Dam: An earth-fill dam constructed across the Penganga River, located on the border of Yavatmal and Hingoli districts in Maharashtra.
– Kangsabati Reservoir (Mukutmanipur Dam): A major earthen water reservoir built across the confluence of the Kangsabati and Kumari rivers in the Bankura district of West Bengal.

Hence, they are all Water reservoirs — Option D.