I find the postprocessing a bit too contrasty, at least on my monitor. Perhaps a tighter crop, exclusing the lady ont he right and a bit of the top, would have helped leading the eye from the photographer to the family.
A good family moment captured, certainly meets the challenge. If this was a candid shot it's very good, the focus is great. I like the different colours. A few patches of overexposure in the sun but nothing that grabs the eye, so that's Ok. A shallower DOF may have been good for blurring the busy background a bit but again, it's not too eye-grabbing so it's Ok. I think this one will probably do quite well.