Which of the following is NOT a process of water cycle?

Ammonification

The correct answer is option 1. Ammonification.

The process of ammonification is not a part of the water cycle.

Ammonification is a process in the nitrogen cycle, where organic nitrogen compounds, such as proteins and nucleic acids, are decomposed by bacteria and fungi into ammonia \((NH_3)\) or ammonium ions \((NH_4^+)\). This ammonia can eventually be converted into nitrates and nitrites through nitrification, which are then used by plants in the process of assimilation.

So, the correct option is: 1. Ammonification