Final answer:
Mecca is the holiest city in Islam and is considered the birthplace of the Prophet Muhammad. It is the destination of the annual Hajj pilgrimage and is home to the Kaaba.
Step-by-step explanation:
The holiest city in Islam is Mecca. Mecca is considered the birthplace of the Prophet Muhammad and is the most sacred city in Islam. It is the destination of the annual Hajj pilgrimage and is home to the Kaaba, which is the holiest site in Islam.
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