When an air parcel with 50% relative humidity is descending in the atmosphere within an area of high pressure, its relative humidity is A) decreasing B) staying the same C) increasing

Option A) decreasing

Explanation:

When an air air parcel having 50 % humidity descends down it contracts due to high pressure and also results in increase in the temperature of air parcel.

Since, an increase in temperature leads to an increase in holding capacity of moisture. As moisture increases, relative humidity declines with increase in moisture content.