How does higher temperature affect the water vapour holding capacity of air?

Correct answer: It increases capacity

Correct answer: A, higher temperature increases the water-vapour holding capacity of air. Warm air can contain more water vapour before reaching saturation, whereas cool air reaches saturation with a smaller amount. This does not mean that warming automatically adds water vapour; it means the maximum possible amount at saturation becomes greater. For example, if the actual moisture stays unchanged while temperature rises, relative humidity may fall because the capacity has increased. Option B is incorrect because the general relationship is the opposite. Option C is incorrect because warming does not remove the capacity to hold vapour. Option D is incorrect because temperature is a major factor controlling saturation capacity. This idea also helps explain why cooling can lead to condensation: when air cools, its capacity decreases, and excess vapour may become droplets. Memory cue: warm air can hold more; cooling brings air closer to saturation.