Which of these are part of a scientific theory

How did the government of egypt change the natural state of the nile river?

How do hearths affect cultural diffusion? a. a hearth is the destination of cultural diffusion. b. a hearth divides a cultural region in two. c. a hearth is the beginning point of cultural diffusion. d. a hearth is the means of cultural diffusion. e. a hearth is the meeting point of two diffuse cultures.

What sequence of events connects the industrial revolution, industrial capitalism, communism, and the cold war?