The statement that best explains how details in the passage develop the central idea that Snowball is trying to make the farm more self-sufficient but is doing it in ways that do not suit the animals or their nature is "The details show that Snowball has created humanlike activities that are unfamiliar to the animals".
The idea of having animals form committees, take classes, improve production, have whiter wool, and so on, is something not related to animal behaviour, but to human behaviour.
