Concept:The Hijrah to Yathrib provided a safe environment for the Prophet to practise Islam freely.Explanation:In Makkah, the Prophet and his followers faced severe persecution and could not worship openly.The people of Yathrib welcomed the Prophet and offered him protection and support.This peaceful atmosphere allowed him to preach and practise Islam without fear.Yathrib was later renamed Madinah because of this new beginning.Answer:D. It gave the Prophet the needed peace to practise Islam.