What is the main task of the legislative branch?
0. to hold criminal trials
to create new laws
to manage the courts
o. to command the military
done

The main task of the legislative branch is B, to create new laws.

Explanation:

It doesn't hold criminal trials or manage the courts, and the executive branch commands the military although it needs Congress' approval to declare war.

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).