Original image
Cropped to half of her face but at original ratio.
Original image. The colour of the edges of the frame add a nice colour detail and frames the girls but detracts the focus from their faces.
This crop focuses on their faces and changes the mood of the image.
The original frame has the family as it's focal point.
Cropped to a 5 x 4 changes the focus of the image to a father's interaction with his daughter.