Step 1: Benefits for area A.
The winter rainfall brought by the Western Disturbance is crucial for the rabi crops in the northwestern states of India, including wheat, barley, and mustard. The rainfall helps in the proper growth of these crops.
Step 2: Benefits for area B.
The rain brought by the Northeast Monsoon is important for the agricultural activities in the eastern coastal regions, especially for the cultivation of crops like rice, groundnut, and cotton. It also helps in replenishing groundwater levels in the region.