Give reasons as to why seasonal reversal of wind direction takes place over the Indian subcontinent?

During summers, the Northern plains are heated up and low pressure is created over the Indian mainland. This low pressure attracts the trade winds of the southern hemisphere which bring the monsoon rains. During October-November, with the apparent movement of the sun towards south, the low pressure trough over northern plain becomes weaker. It is gradually replaced by high pressure system. This cause reversal of wind direction over the Indian subcontinent.