Warm-up sketch: 3 preteens

I saw a stock photo of three preteen kids walking along in a field. Two were close together, one was a little further back. Why? Maybe the two forward characters were in a fight with the third? Or is the third one harassing the two? What's unique about number three?

These were the questions running through my head as I sketched them. I noticed also that I didn't "study" the reference photo and try to make the drawing look like it. I rarely do that unless they are photos I took myself. It's like I use the photos as a launching pad for ideas.