Concept:Yawmut-Tarwiyyah is the 8th day of Dhul-Hijjah, and it marks the beginning of the Hajj rites.
Explanation:On this day, pilgrims leave Makkah and proceed to Mina to start the Hajj rituals.
The name "Tarwiyah" means quenching of thirst, as pilgrims historically watered their animals here.
The remaining options describe events that occur later in the Hajj.
Visiting the Jamarat and making sacrifice happen on the 10th, 11th and 12th days.
The first Tawaf (Tawafuz-Ziyarah) is performed after returning from Arafah and Muzdalifah.
Spending the night in supplication at Muzdalifah occurs on the 9th night after Arafah.
Only the commencement of Hajj rites takes place on the 8th of Dhul-Hijjah.
Answer:The 8th of Dhul-Hijjah is Yawmut-Tarwiyyah because it marks the beginning of Hajj rites.