Well I mean it is a poet, but it could be a child of the future poet since it's written in past tense
The purpose a plot could serve is the events that make up the story/essay
I was going to ask you if you were ok with that
If something is illuminated it means is is lit up by another source. If something is luminous it means that the 'something' in question exerts light.
Answer:
The white dress could symbolize a clean and simple life, and maybe even that she is bored of this life. The girl wearing this and running towards the woods could symbolize her leaving her life and taking a risk as she goes to places she doesn't know, that are unfamiliar and maybe more complicated, like the woods are to her. You could say that she is leaving her old life behind and wants to change, assuming she is not being chased and is running into her new life voluntarily.
Explanation:
This could be some type of a metaphor, for starting a new adventure. I'm not sure what is supposed to be described with imagery, but I hope that this helped!