Concept:The Prophet’s retreat to Cave Hira led to his first encounter with Angel Jibril and the beginning of divine revelation.Explanation:The Prophet Muhammad used to withdraw to Cave Hira for reflection.While there, Angel Jibril appeared to him and delivered the first revelation from Allah.This marked the beginning of the revelation of the Glorious Qur’an.Answer:B. revelation of the Glorious Qur’an