step one: make your selection by using the quick selection tool and selectiong the part of the picture you want to coppy. (i flipped the picture so it would be at a different angle)
Step two: feather your selection so your image doesnt look cut out. you can feather an image by going to selection then modify then feather, the higher the number the more the selection will be feathered.
step three: coppy and paste your selection onto your second image.
step four: go to edit and free transform to move your selection and change the size or shape.
step five: you can edit your second picture by selecting that level. in this picture i made it black and white. then i used the smudge tool to make the swirl effect on the vase because the color was very pixilated. this gives it a more surreal feeling and overall makes it a stronger picture.
step six: merge the two layers together and save your final image!