Pumpkin patch: Suppose we plant pumpkins in a garden where half of the plants are shaded. Then, to test new fertilizer, we fertilize the plants in full sun and do not fertilize the plants in the shade. In the fall, the fertilized plants yield more, bigger, and prettier pumpkins. Identify each variable with one of the following terms: confounding variable, explanatory variable, or response variable. Note that any given term may be used multiple times or not at all.
Fertilizer
Pumpkin harvest
Sun/shade