ANS:A - temperature rises.

The relative humidity of air decreases despite an increase in the absolute humidity when the temperature rises. This phenomenon occurs because warm air can hold more water vapor than cold air. When the temperature rises, the air's capacity to hold water vapor increases. If the amount of water vapor in the air remains constant (or increases at a slower rate than the air's capacity), the relative humidity decreases because the air is now capable of holding more water vapor relative to its total capacity. Therefore, when the temperature rises, the relative humidity of air decreases despite an increase in the absolute humidity.