In the given passage, it has clearly illustrated the water cycle involves the following processes,
1. Precipitation: rain, snow etc
2. Evaporation: evaporation of water vapour into the atmosphere due to hotness
3. Condensation: formation liquid droplets due to cooling from the vapor. This process is going to happen once the water vapour undergoes cooling.
Thus, the options (d), (b) and (a) are incorrect.
Condensation: formation liquid droplets due to cooling from the vapor. This process is going to happen once the water vapour undergoes cooling.
Therefore, the correct option is – d. Condensation fails to happen when water vapor cools and changes back into droplets of liquid.