That's false. Row Row Row Your Boat is a melody
In photography studies the main source for creating and Working with light and light to change mood or other dynamics such as artificial light exercise light painting ect other fundamental ideas are used to manipulate lighting in an image....
A principal of design that i see in the image is unity because the room represents the ocean and there are fish surrounding which brings everything together and balances out the message the author is trying to get across. hope that helps :)
