Which sentence in the paragraph is a minor details?

Large-scale cultural change never occurs without one or more causes. One cause is a change in the natural environment. A climate change; a shortage of wheat, gasoline, or some other resource; a sudden rise or fall in population—all force people to adapt. Another cause of cultural change is new contact between societies with differing customs, values, and technology—for example, following an invasion or new trade relations. Yet another cause is a discovery or an invention, such as the discovery of germs or the invention of the Internet.

Question

Which sentence in the paragraph is a minor details?

Large-scale cultural change never occurs without one or more causes. One cause is a change in the natural environment. A climate change; a shortage of wheat, gasoline, or some other resource; a sudden rise or fall in population—all force people to adapt. Another cause of cultural change is new contact between societies with differing customs, values, and technology—for example, following an invasion or new trade relations. Yet another cause is a discovery or an invention, such as the discovery of germs or the invention of the Internet.