Life is kicked off at fertilization. It does not necessarily mean However that a fertilized egg is human. It has to descend from the fallopian tubes and get embedded to the uterus first, otherwise it’s just a rotten egg. If it did not go down the tube, the egg did not “die”, it just did not develop into a human life. Even one that is recently attached to the uterus is not human. There’s a lot of things that need to happen before a fertilized egg becomes a human life
I think that’s where the respondents are coming from. They did not get clear instructions. What they answered was “when is the process of creating a human kicked off” Not “when is something first considered to be a living entity”.
Those are two different interpretations of the question “when does life begin?”