To better assist you, we definitely need the rejection reason Adobe sends. However if I were to guess, I would believe the rejection might include intellectual property violation, technical issue, and or exposure. Part of the sea horizon is blown out with too much of a highlight. There's writing on the wall of the first image. Also there might be an issue with the framing of that image, and or the intensity of the light entering. If the third is not a country flag then it would attract an intellectual property violation rejection. And the last image might have a technical (framing) issue..
These are my guesses. Send us the reason from Adobe and we'll be better able to assist you.