Answer:
The correct answer is -
The independent variable - different brand of plant food
The dependent variable - the number of flowers blooms from different plant groups.
Step-by-step explanation:
In this study the different brands of plant food are given to the 3 groups of plants, each group has 10 plants. The first group of plants gets water only so it is the control group while the other two groups of plants get different treatment. So, the independent variable would be different brands of plant food as we know the independent variable is a variable that manipulated in a study.
The dependent variable is the effect of the change in the independent variable and measured in an experiment so in this study, the number of flowers blooms after the treatment is being measured thus, it is the dependent variable.