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You're welcome. The reason is that it reduces the number of elements in the picture and directs the attention of the viewer to the main subject, which is the couple taking a walk.

What makes your pictures special is the absolutely stunning light! Also, I'm really glad you were there with your camera to capture that couple because are a perfect main subject. There is a dialogue between them.

I also love the layers of the background made up of different hues of gold.