Why was Peru a difficult place for a civilization to develop?

I think its because it does not have that great resources so not many people will want to go there.

Explanation:

Because of its rough terrain

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

someone or something lol