Your photo has a great contrast with the red against the green grass it brings a lot to the photo. I did notice that at the top of the photo on the left side there is something that should be croped out because it takes away from the photograph message, something thing that would have made this photo better would be if the left side was the darker side of the two showing that she is trapped and the legs the lighter side to show the freedom. The lack of her face gives everyone a personal attachment to the photo!

I just love the contrast between red and green. It immediately catches the eye. Although they are opposite colors they look extremely pleasant together and they make each other pop so nicely.
The composition is impressive as well. The transition between the two positions inside and outside the cage is very well depicted. It's nice that you didn't show the face of the model - that makes the picture all the more relatable.
A very interesting and suggestive detail is the position of the hands - they lack the anger and frustration of trying to break free, instead they portray a certain amount of resignation.
On the other hand the impact would be stronger if there were a few more details like parts of the story.