According to the united nations, at what rate are plant and animal species becoming extinct? how does the program suggest that humans are contributing to the extinction of rare species?

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).

your answer would be just capitalism.