Concept:The ritual of moving between Safa and Marwah commemorates the faithful act of a specific woman in Islamic history.Explanation:Pilgrims hasten between the hills of Safa and Marwah in a rite called Sa‘ee.This act reminds them of Hajar, the mother of Prophet Isma‘il.She ran between these two hills searching desperately for water for her infant son.Her trust in Allah and her struggle are honoured through this pilgrim ritual.The area of this walk is known as al-Mas‘aa.Answer:C. Hajar