Please, please, please, read the rules, ask questions, google what you don't know, ask a pro, get a book, something for christ sake. I hated down grading this pix for a mere technicality.
Magical moment - you should be selling it to the travel companies. The curve of the wing of the flyer makes a nice parallel with the circle of the setting sun, and you've balanced those two elements within frame very well. Likewise, the secondary parallel of the little cloud and the horiizon make a nice counter-balance. Whilst a well-achieved shot, it's perhaps not so uncommon an image in itself, and perhaps, for this challenge, doesn't really tell us enough about the subject of this 'portrait'. For me, it's absolutely fitting, but having seen what's been written, as well as from one or two of the comments I have recieved, I suspect it won't be enough of an orthodox portrait.
This is not a portrait IMO.
As for the photo: I like the sky and sun, but I think the chutist should have been closer so he is more than a dot in the sky.
A bit of a stretch to call this a portrait though technically it may be. Still it's a very nice scene with all that negative space. The nice bright circle of the sun and the parachutist looks great. The hills look good too and the cloud is probably not needed but doesn't take anything away either.