Why do the monsoon winds change their direction?

Monsoon winds change direction primarily due to the differential heating of land and sea. During summer, the land heats up faster than the ocean, creating low pressure over the land and drawing moist air from the ocean. In winter, the land cools more quickly, leading to high pressure, which causes the winds to reverse and blow from land to sea. This seasonal shift in pressure systems drives the characteristic patterns of monsoon winds.