River Valley Civilizations Practice Test

Monsoons are seasonal wind patterns in tropical regions that bring a distinct wet season of heavy rains. In the warmest months, land heats up and draws in moist air from the sea, producing intense, long-lasting rainfall that waters crops and helps prevent famine. This seasonal rainfall is what makes agriculture possible in areas like the Indian subcontinent and parts of Africa. The other ideas don’t fit as well: monsoons aren’t defined by ocean currents causing storms, nor by cold weather, and while there is a dry season too, the defining, remembered feature is the heavy, crops-supporting rains.