When we talk about the figure/ground relationship in visual art we are usually referring to how the forward objects interact with the background. This is not limited to literal figures. We could just as easily be considering how a vase of tulips stands out or merges with the space behind it.
In this photo the tree is separate from the mountain thanks to color, value and edge quality. If you were painting the scene, do you think you could afford to let some of the edge of the figure merge with the ground? Would you use hard edges or soft for the detail on the mountain?
Give it a try one way or the other, or perhaps both.
It's not necessary to duplicate the photo. Make any changes you please.