Alexander W. answered 12/02/23
Biology & Ecology for Middle School, High School, and College
There are a few ways to answer this, depending on how specific they want you to be, but I think just know why plants need each of these aspects of plant growth is going to give you a good answer. For example, why do plants even need sunlight in the first place? Plants use photons from light and water in their roots to make sugar. Why do they make sugar? They use sugar cellulose to construct and support the plant, or the sugar can be used for energy. A plant with more sunlight is going to have more energy for photosynthesis, so it will increase plant growth.
PH and KSO4 are also very important, but how? Try and ask why a plant needs each to answer the question. Then ask yourself what would happen if you lowered the PH too much, or took away a source of KSO4. Good luck!