Correct Answer: falling air pressure

Solution : The correct option is falling air pressure .

In northern India, particularly during the summer months, a phenomenon known as the "Indian low-pressure area" or "low-pressure trough" is observed. This low-pressure area is associated with the thermal low formed due to the intense heating of the Indian subcontinent during the summer season. The low-pressure system is associated with the monsoon rains that bring relief to the region.