Read these sentences from Paragraph 5 of the passage. Groups in some parts of the world made innovations so dramatic that historians call it the Neolithic Revolution. The Neolithic Revolution is also referred to as the agricultural revolution. It marked a great shift, as humans turned from hunting and gathering to farming—from food getting to food-producing.

How does the phrase "agricultural revolution" affect the passage?

It shows readers the frustration that the farmers felt using outdated farming methods.
It implies that the passage is intended for people with an interest in the early development of food production.
It indicates how farmers have always fought to protect their land and animals from being destroyed by hunters.
It makes readers aware of the massive changes that occurred in how people found new sources of food.