Answer:
The answer is below
Step-by-step explanation:
Dar al-Islam is simply a region where Muslims are the majority and are governed according to Islamic principles. In other words, it is simply a home of Islam. For example the like of Middle East or specifically, Saudi Arabia.
On the other hand, Mongols are originally pagans, who are famous for their invasion throughout the Asian region. One of the major invasion of Mongols in the Islamic region or Arab world resulted to the end of the Abbasids, causing crucial destruction to the Islamic societies. This includes cities such as Baghdad.