Final answer:
The independent variable is the different kinds of flowers, and the dependent variable is the number of bees.
Step-by-step explanation:
The independent variable in this scenario is the different kinds of flowers that Shelly placed on her porch. The dependent variable is the number of bees that came to each flower. The independent variable is the one that Shelly intentionally changes or manipulates, while the dependent variable is the one that is affected or influenced by the independent variable.