Main causes of origin of Monsoon -

The correct answer is All of these. Jet Streams develop where air masses of differing temperatures meet.El Nino:El Nino refers warming of sea surface temperatures across the central and east-central Equatorial Pacific.El Nino is associated with high pressure in the western Pacific.El Nino is the opposite of La Nina.Rainfall follows the warm water eastward, with associated flooding in Peru and drought in Indonesia and Australia.El Nino adversely impacts the Indian monsoons and hence, agriculture in India.Equatorial low-pressure belt:This belt extends from the equator to 100 N and 100 S latitudes.The intertropical convergence zone (ITCZ) is known as the region of convergence near the equator because the winds FLOWING from subtropical high-pressure belts converge here.Water vapor condenses as air rises and cools in the ITCZ, forming clouds and falling as rain. This low-pressure belt is also known as doldrums because it is a zone of total calm without any winds.Due to high temperatures, a low-pressure belt is created in the equatorial region.This GIVES rise to air convergence in the area.SOUTHWEST monsoons winds:India receives most of its rainfall from the southwest MONSOON winds.'Southwest Monsoon' period is referred to as the period between June to September.South West monsoons are the rain-bearing seasonal winds that flow from the Arabian Sea towards India's mainland in the South-West direction.North-east monsoons:When winds move back from the land to the sea, it is known as retreating monsoons. Retreating monsoons are also called as north-east monsoons. October to December is referred to as the period of North-east monsoonsThey START with the withdrawal of southwest monsoons.The Tamilnadu receives the highest rainfall from the North-East monsoon.