The 10th year of Prophethood (619 CE) is called Aam al-Huzn (Year of Sorrow), though the answer key indicates 7th Nabvi. During this year, the Prophet (PBUH) suffered two devastating losses: the death of his beloved wife Hazrat Khadijah (RA), who had been his greatest supporter and first believer, and the death of his uncle Abu Talib, who had protected him from Quraish persecution. These losses left the Prophet vulnerable to increased persecution from his enemies.