Why there are differences in amount of rainfall caused by the monsoon in the different areas of Pakistan?

The differences in rainfall during the monsoon season in Pakistan are primarily due to geographical factors, including topography, elevation, and proximity to the Arabian Sea. Areas like the eastern and northern regions, such as Punjab and Khyber Pakhtunkhwa, receive more rainfall due to orographic lift, where moist air is forced to rise over mountains. In contrast, western and southern regions, such as Balochistan and Sindh, experience less rainfall due to their distance from moisture sources and the presence of arid landscapes. Additionally, local climatic conditions and wind patterns further influence the distribution of monsoon rains across the country.