Pull factor. sorry for the late response, hope this helps!
I think it's B, if they are geographically around one another and share some racial background they are related. DNA, for example does prove we can be closely related. Genetics and such.
Really hope this helps, tell me if i'm wrong!
The "Rust Belt" of the manufacturing heartland of the nation
A change in the core would have the greatest effect on the convection currents in the mantle. Hope this helped!
