Answer:
The social science that are in these pictures is anthropology.
In the pictures I can see that the bones have been there for a long period of time . Also, the bones can be anywhere or even very close to each other. There are whole where the bones might be meaning there can be where there cemetery were until they had all die.
I believe it would be milestones
It closed down all trade routes to Asia.
https://www.theknot.com/gs/preview/wedding
