The correct answer to this open question is the following.
Although there are no options included, we can say that motif he returns to repeatedly to symbolize this transformation is the butterfly.
Damien Hirst's work is largely concerned with spirituality, and with the notion of death as both an end and a beginning. When he uses the butterfly as the motif, what he wants to show is the transformation process from the caterpillar to the butterfly. The caterpillar has to pass through an extremely hard transformation process of change and renovation to become a better form of existence in the form of a butterfly that can fly and expand.