Who are the Bibas family and why have they become significant in the context of the October 7th attacks?

The Bibas family - Shiri and Yaden, along with their two young sons Ariel (4) and Kfir (9 months) - were seized during the October 7th Hamas attacks. The two children became the youngest hostages taken and have transformed into powerful symbols across Israel representing the brutality of the October 7th attacks. The transcript indicates there may be confirmation that the family is among four bodies being examined by Israeli forensic teams. If confirmed, this would mark an extremely painful moment for Israel, as these young children and their parents have come to embody the human tragedy of the conflict.