This is an assignment and in this case one needs to do what the teacher says but I think learning about visual language is far more important than learning any of these rules. The more fluent you become the less you need rules.
Advice I once received from a great photographer was what you really need to know is this; that either everything in the photograph is helping that photograph and if it's not helping the photograph then it's hurting it. A quest for becoming fluent in the language that has been with us and is always changing for 2000 + years of two dimensional art will help one understand whether everything in the frame is helping ot hurting.
Understand how things like repeating shapes, leading lines, implied texture, color, tone or any other visual elements are either supporting the visual statement or when those things are fighting each other and maybe hurting the visual statement, in my opinion, are what it's really all about.
If everyone is using the same rules then how can their be any freshness of vision or how can anyone ever develop a style? We see it now with the sea of sameness out there where everyone follows the same rules.
Quotes from photographers that were all fluent in the language....
Weston said this:
"When subject matter is forced to fit into preconceived patterns, there can be no freshness of vision. Following rules of composition can only lead to a tedious repetition of pictorial cliches." - Edward Weston
....... "so called “composition” becomes a personal thing, to be developed along with technique, as a personal way of seeing." - Edward Weston
And a few other great photographers on rules:
"And in not learning the rules, I was free. I always say, you're either defined by the medium or you redefine the medium in terms of your needs." - Duane Michals
"Photography is not a sport. It has no rules. Everything must be dared and tried!" - Bill Brandt
"There are no rules for good photographs, there are only good photographs." - Ansel Adams
"There are no rules and regulations for perfect composition. If there were we would be able to put all the information into a computer and would come out with a masterpiece. We know that's impossible. You have to compose by the seat of your pants." - Arnold Newman