For the background, it seems easy enough... it's grey stone with snow, so not much chroma to be had... But you seem to have gotten the leaves to go away, too.
Hmm, per-channel levels and/or curves?? Anyway, I'm curious. It's a nice shot, and neat to think it was done with only basic editing.
This is kind of hokey for my taste and almost as a rule I hate selective desaturation, but I do like the background quite a bit. I like the the way the gates create a visual maze leading you in and out of the picture. I think I would have enjoyed this more without the dying flower and instead the focus being on the headstone. The flower just interrupts my enjoyment of the background.
ehh, I'm torn. You do have a shallow depth of field here, but then you went and desaturated selectively as well, which almost takes away from the effect of the shallow dof and turns it into an effect of selective desaturation. I do like the image very much, just trying to decide if the selective desat is kind of a cheap shot (but very effective, visually.). OK. Giving this an 8 because it is such a compelling image and you did meet the challenge criteria.