Read the below questions carefully and answer the given questions:The vast northern plains along the Himalayas provide habitat and livelihood to 40% of the country’s population. Their fortile soil, suitable climate, flat surface have contributed significantly in the spread and development of rivers, canals, roads, railways and cities and in the development of agriculture. Therefore, this plain region has the distinction of being the granary of the country. These plains have built a special kind of civilization and society since the Aryans. People from all over the country consider Ganga to be a holy river and the Rishikesh, Haridwar, Mathura, Prayag, Ayodhya, Kanshi etc. places in its valley have been the center of attraction for sufi saints and religious people living in different parts of the country. Later in these plains, great men like Sikh Guru, Mahatma Buddha, Mahavir Jain were born and different religious were established. Its deep impact can be seen in the Himalayan mountains and also in South India.(a) Name the major landforms created by the rivers in the vast plains of the north.(b) Describe the huge northern plains contribute to the development of the country.