Final answer:
The story of Prophet Ibrahim (Abraham) commemorates his obedience to God's command, the sacrifice of his son, and the sending of a ram by God to substitute for the human sacrifice, which is pivotal in Judaism, Christianity, and Islam.
Step-by-step explanation:
The story about Prophet Ibrahim, or Abraham, is commemorated for all of the above: his obedience to God, the sacrifice of his son, and the sending of a ram by God for sacrifice. This story is significant in Judaism, Christianity, and Islam - the three major monotheistic religions that view Abraham as a pivotal figure. In Judaism, Abraham was willing to sacrifice his own son to fulfill God's will, showcasing his obedience. Within Islam, Ibrahim's readiness to sacrifice his son is commemorated annually during Eid al-Adha, where the sending of a ram by Allah to replace Ibrahim's son as a sacrifice is celebrated. This profound act of faith and willingness to submit to God's command is a foundational narrative in these Abrahamic faiths that strengthens the bond between Allah and His followers.