1. a series of wars between Neolithic and Paleolithic peoples
2. the development of writing systems to record history.
3. the growing of crops and the taming of animals by early humans.
4. the use of fire by early humans to change their environment.
Of the options presented here, the correct one is clearly Option 3. The other options either did not happen or simply were not events of the Neolithic Revolution.
The option that never happened is a series of wars between Neolithic and Paleolithic people. It is, of course, possible that there was conflict between these types of people. However, it is not as if all Neolithic people would have banded together to fight all Paleolithic people. The Neolithic Revolution had nothing to do with war.
The other two options did occur, but were not part of the Neolithic Revolution. The use of fire by humans came about long before the Neolithic Revolution. The invention of writing came after the change to the Neolithic and there were many Neolithic people who did not invent writing on their own.
The Neolithic Revolution is also known as the Agricultural Revolution. This was a time when people started to domesticate plants and animals. This allowed them to live in sedentary populations with much larger population densities. They were still using stone tools (which is why it is called the Neolithic) and they did not have writing. Even so, the development of agriculture constituted a change that is so momentous that we call it a revolution.