Life is a fascinating phenomenon. Many aspects of this phenomenon demand an explanation.
First and foremost on the list of things demanding explanation is that the universe appears to be fine-tuned for life. QO explains this by means of the QO multiverse.
Secondly, the sheer abundance of life demands explanation.
A third phenomenon relating to life is that of altruism. This demands explanation, in particular because it is not clear how evolution could result in it.