Answer:
The relationship between the attacks on 9/11 and ISIL is discussed below in details.
Step-by-step explanation:
The Only relationship between the attack on 9/11 and the attacks which are done by ISIL is that in both attacks common people lost their lives for no reason. but the difference is that attack on 9/11 was a terrorist attack and almost 2500 innocent people lost their lives.
However, ISIL is a terrorist outfit group that is highly active in the Middle East and especially in Iraq and killing innocent people on the name of Jihad but security forces of all around the world and especially US forces trying to eliminate them and prevailing peace in the region.