Assertion (A): The amount of moisture in the atmosphere is related to latitude. Reason (R): The capacity to hold moisture in the form of water vapour is related to temperature.

1. This is an Assertion-Reason question about atmospheric moisture, latitude, and temperature. 2. Assertion (A): The amount of moisture in the atmosphere is related to latitude. This is true. Temperature generally decreases with increasing latitude (away from the equator). Since the air's capacity to hold moisture depends on temperature, the actual amount of moisture (absolute humidity) tends to be higher in warmer, lower latitudes and lower in colder, higher latitudes. 3. Reason (R): The capacity to hold moisture in the form of water vapour is related to temperature. This is true. Warmer air can hold significantly more water vapour than colder air. This relationship is described by the saturation vapour pressure, which increases exponentially with temperature. 4. Evaluating the relationship: Both A and R are true. Does R explain A? Yes. The reason the amount of atmospheric moisture is related to latitude (A) is *because* the capacity to hold moisture is dependent on temperature (R), and temperature itself is strongly related to latitude. Therefore, R is the correct explanation for A. 5. The correct option is (A).