Question

how do the different physiographic regions of India complement each others

Answer 1

Each region complements the other and makes the country richer in its natural resources. The northern mountains i.e. The himalayas are the major sources of water and forest wealth. The northern plains are the granaries of the country. They provided the bases for early civilizations. The plateau is the store-house of minerals, which has played a crucial role in the industrialization of the country. The coastal  region and the islands groups sites for fishing and port activities. Thus  as the diverse physical features complement each other India is  unified as a whole.