Please select the word from the list that best fits the definition producer of 80 percent of the rainfall in East Asia

Summer monsoon.

Explanation:

The summer monsoon is a seasonal wind blowing in South Asia, heading from the sea to the mainland and producing very heavy rainfall.

The summer monsoon is formed when the sun shines perpendicularly above the continent, as the earth heats up and heats the air above, which starts to rise. The air above the Indian Ocean is cooler as the water warms up more slowly than the earth. As a result, moist air begins to flow from the sea to the land in place of the air that has risen upward. When moist clouds meet on the continent, moisture condenses and begins to rain.