A. Monsoons mainly affect India, south East Asia, and East Asia.
C. Monsoon provides 20 percent of India's annual rainfall.
D. A monsoon is a seasonal wind that comes with heavy rain.
Monsoon is popular in India and other Asian countries between June to September. Traditionally, it was defined as reversing of wind seasonally accompanied by a change in precipitation. The recent definition is that it is a change of precipitation due to the heating of sea and land.
In India, it is the norm and it affects the economy every year. The geographical features of India have a big influence on the monsoon patterns. In another part of the Asian continent, monsoon has a much desired effect on agriculture, flora, and fauna; therefore, it is highly desired weather phenomenon promoting the positive economy.