What is the importance of the monsoon in South Asia?

What is the importance of the monsoon in South Asia? How does wind direction and landscape affect the monsoon? What effect does it have on the environment? How does it affect agriculture?

The most important feature of the monsoon period in south asia is in connection to ur last question which deals with agriculture.

So, mainly the monsoon there is related to agriculture.

And there is a definite effect of wind direction and landscape and is mainly concerned with the intensity of rainfall.

They, i mean the wind direction and landscape , also control the span of monsoon and the amount of rainfall received.

As far as the effect on environment is discussed about, it brings few causal effects to my mind which are related to soil erosion, floods, and landslides.