South Asia refers to the vast area between the central and western Himalayas in southern Asia and the Indian Ocean. The terrain is divided into three terrain areas from north to south, namely, the northern mountainous area, the central plain and the southern plateau. Most parts of South Asia belong to tropical monsoon climate, and the remarkable feature of south subtropical monsoon climate is that a year can be divided into three seasons; South Asia is not only one of the cradles of ancient civilizations in the world, but also the cradles of Buddhism, Hinduism and other religions. Hinduism is mainly prevalent in India and Nepal; The residents of Pakistan, Bangladesh and Maldives mainly believe in Islam.
So the answer is: the terrain is divided into three major terrain areas from north to south, namely, the northern mountainous area, the central plain and the southern plateau; Most parts of South Asia belong to tropical monsoon climate, and the remarkable feature of south subtropical monsoon climate is that a year can be divided into three seasons; South Asia is not only one of the cradles of ancient civilizations in the world, but also the cradles of Buddhism, Hinduism and other religions. Hinduism is mainly prevalent in India and Nepal; The residents of Pakistan, Bangladesh and Maldives mainly believe in Islam.