The main idea of this paragraph is A
E. The United States has the largest number of immigrants today.
The clothing is different, in South India women generally wear sari whereas in North India women generally prefer salwaar kameez or chudidar. The architecture is different as well, In north india there are a lot of islamic inspired buildings. The food is different as well, in north india they eat a lot of wheat based foods and in the south they eat a lot of rice.<span />