Which letter identifies the peninsula that is home to mecca religious center of Islam?

Mecca is located in Saudi Arabia, on the Arabian Peninsula. It is the birthplace of Prophet Muhammad, the founder of Islam, and the site of the Kaaba, the most sacred site in Islam. Every year, millions of Muslims from around the world make the pilgrimage to Mecca, known as the Hajj, to perform religious rituals and seek spiritual enlightenment.