Answer: The phrase that relates to the study of geography is "The effect living and nonliving things have on each other".
Step-by-step explanation: The study of geography consists in observing the living organisms and non-living organisms that are part of the Earth as well as describing the relationship between them, which is what the phrase "The effect living and nonliving things have on each other" also indicates. Moreover, studying geography is also about examining the changes that certain objects or phenomena have went through during a period of time.