INDIAN GEOGRAPHY

Detailed explanation-1: -The bils are the uplands of Marshy areas. The Deltaic plain is the extension of the Khadar land. It covers large area in the lower reaches of the Ganga River. In the delta region, the upland is called Chars, while the marshy area is known as bils.

Detailed explanation-2: -The delta plain is considered as the extension of Khadar land. This area is depositional in the lower reaches of Ganga River. It comprises old mud, new mud, and marsh. The uplands of the delta region are ‘Chars’ and the marshy areas are ‘Bills’.

Detailed explanation-3: -Sundarbans, formerly Sunderbunds, vast tract of forest and saltwater swamp forming the lower part of the Padma (Ganges [Ganga])-Brahmaputra River delta in southeastern West Bengal state, northeastern India, and southern Bangladesh.

Detailed explanation-4: -Detailed Solution The uplands of these Delta regions are called Chars. The delta plain is depositional in nature and comprises marsh, old mud, and new mud. The Marshy areas in the Delta are called Bills.