Which is the most correct conclusion for understanding humidity, evaporation and condensation together?

Correct answer: Humidity shows the moisture present in air, while thermal conditions influence whether evaporation or condensation occurs.

The correct answer is A. Humidity means the amount of water vapour present in the air. Evaporation is the change of liquid water into water vapour, and it generally requires energy, especially heat. Condensation is the reverse change: water vapour changes into liquid water when air cools to saturation or loses the capacity to hold additional vapour. Temperature therefore strongly affects both processes, although wind, surface area, pressure and the existing moisture content also matter. A is correct because it connects the three ideas without treating them as identical. B is wrong because temperature changes the saturation capacity of air and affects evaporation and condensation. C is wrong because the two processes are opposite phase changes: evaporation adds vapour, whereas condensation removes vapour from the air. D is wrong because condensation requires water vapour and commonly produces liquid droplets or ice; it does not require an absence of water. Memory cue: warm conditions generally favour evaporation, while cooling toward saturation favours condensation.