Answer: I

                                The Ka'aba and the Haram in Mecca (Islam).  The Ka'aba is the structure in whose southwest corner is located the Black Stone sacred to Islam.  The Haram is the name applied to the mosque and enclosure where the Ka'aba is located.  This is the place toward which Muslims face when they pray--the lodestone of Islam, and Mecca is the place of Islamic pilgrimage.  prayer and pilgrimage are two of the five pillars (or obligations) of Islam.