Colour manipulating an image

This is the image in full colour and follows the rule of thirds.

Here I made the background black and white and made the red bridge stand out. I did this by firstly duplicating the layer with the image on it and then hiding it. Then I clicked background and went to image on the top then adjustments, black and white clicked auto and then okay. Then i unhid the background and went to select couloured image clicked select colour range. Then I selected the eyedropper tool and clicked on the red bridge and selected the right fuzziness.Then I copy and pasted the selected area then clicked on the coloured layer. Then I hid the background.

The reason I did this is because I thought the audience would prefer it because it helps you focus more on the bridge and shows off the vibrant unusual colour of the bridge against the black and white background whereas before it was a bit drowned out by the other colours in the background. Making the colour stand out and the background aswell as using the rule of thirds makes your eyes immediately focus on it and away from the more boring background. I also think it makes it look quite mysterious and more exciting and it makes it look quite retro with a modern hint with the burst of red on the bridge.