Explain how trade networks caused Islam and Buddhism to spread

The trade network caused Islam, Budd hff a and other religious members to travel the Silk Road selling goods. it gave travelers the opportunity to share beliefs and ideas leading to travelers spreading the their new knowledge .

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).