This part must be written by you, from your point of view.
Tell me your 'story' - what makes your unique and interesting to others? It can be a past, present or future story, event, idea, dream, trip, point in time, something you did, something that happened to you, something you had a big impact on, etc.
What it is not is a resume. The Model Competition is not looking for anything along the lines of 'I went to XYZ school, I played XYZ sport, I am in XYZ club and I want to attend XYZ college and become a teacher and get married and have kids and teach.' There is nothing unique or interesting about that to someone who does not know you.
Write this from the standpoint of what would be interesting to someone who has never met you, did not know how old you are, where you lived, what you did, anything at all about them. What would you share that would be interesting to someone else?
The Model Competition is also not looking for 'picture perfect' stories. Not all stories will have happy endings, or 'rainbows and sunshine.' Some may be hard to read or tell. Others may be hilarious and funny. What I do not want is something 'generic' or something that shows perfection in every way. This is meant to be a very authentic story or event or dream, etc., that would interest someone who does not know you.