Not sure where you're going with this.
A photo should tell a story, and I'm not following this one.
Perhaps a bit more detail regarding the girl's surroundings would help to place her in context and tell me why she is wearing such a serious expression.
Too underexposed I think. Also I don't think it meets the "artificial" light requirement for the challenge. You might be marked down on the scoring for that.
This shot does not seem to use an artificial light source. It looks like it is using the sun. Also I think it should have been cropped different so that their was more space in front of the subject. Other than that I think it is a really good shot