1. Arab chiefs used to quarrel without any- This made Muhammad
3. Mount Hira is also called
4 The first woman to become a Muslim was
5 The first young man to become a Muslim was
6. Among the first grown-up men to accept Islam were
and

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Khadija bint Khuwaylid

Hazrat Abu Bakr

Zayd ibn Harithah and Abu Bakr

Explanation:

Khadija bint Khuwaylid was the first woman to become a Muslim. She is the wife of Prophet Muhammad (S.A.W). Hazrat Abu Bakr was the first young man to become a Muslim. He is the close friend of Prophet Muhammad (S.A.W). Mount Hira is also called the place where Prophet Muhammad (peace be upon him) received his revelations from Allah through the angel Gabriel. Zayd ibn Harithah and Abu Bakr were the first two grown-up men that accepted Islam.