Question

define an international network of loosely affiliated terrorist groups responsible for the september 11th attacks in new york city. bolsheviks al-qaeda religious extremists in the united states taliban

Explanation:

Al - Qaeda is an international terrorist organization. The September 11th attacks in New York City were carried out by Al - Qaeda operatives. The Bolsheviks were a political group in Russia (related to the Russian Revolution). Religious extremists in the United States are a domestic (U.S. - based) group and not responsible for the 9/11 attacks which were an international plot. The Taliban is a political and military group in Afghanistan (though they had relations with Al - Qaeda at the time, Al - Qaeda as the terrorist network is the direct answer).

Answer:

Al - Qaeda