For this image, i used Layer Mask to select the tarts and change the hue and saturation of the background to a duller shade, making the tarts stand out more.
Also, i selected the strawberries with the Magic Selection tool and changed the vibrance to make the red more pronounced.
This time, i used the Colour Balance tool, Brightness/Contrast tool (easier to use compared to Curves) and Curves to retouch the photo. Once again, the tools are used to manipulate the vibrance of the red raspberries to capture viewers' attention.
As for this last picture, i applied the same Adjustments before, but with different values.