Final answer:
The title 'Father of Faith' for Abraham is fitting due to his unwavering trust in God and his pivotal role in setting the foundation for the Abrahamic religions by demonstrating deep faith through his actions.
Step-by-step explanation:
Abraham is called the Father of Faith because of his unwavering trust in God, not because he was the first human created by God, had many children, or because he was a great leader. His willingness to obey God's commands, such as leaving his home in Mesopotamia and almost sacrificing his own son, is seen in the Hebrew Bible and is a testament to his deep faith. This is why, across the Abrahamic religions—Judaism, Christianity, and Islam—Abraham is recognized for his profound spirituality and trust.