Prevent tyranny by acting as a check on power.
Many people decided to move from more rural areas that offered land and space for farming to cities that had factories and offered job opportunities
between Europe and Asia (dividing Eurasia): along the Turkish Straits, the Caucasus and the Urals (historically also north of the Caucasus, along the Kuma–Manych Depression or along the Don River) between Asia and Africa (dividing Afro-Eurasia into Africa and Eurasia): at the Isthmus of Suez.
I think the answer is letter C I am so sorry if I am incorrect
