You can see more details depending on how "zoomed in" it is or how small the portion is. For example if you look on a map of the world you can see the landforms and bodies of water, but if you look at one of just the US you can see the different state borders as the state capitals, lastly if you look at one of just a single state you can see all the different streets and all the city's located in that state.
D. Urban cities due to human population/activity
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!
Examples of volcanoes the located along divergent plate boundries are Krafala volcano in Iceland and Erta Ale and Oldoinyo Lengai in africa.
