PLEASE ANSWER FOR BRANIEST Alex wants to grow some flowers for his wife, but isn't sure which flowers will grow best in the soil in their yard. He goes to Lowe's and buys hydrangeas, roses, daisies, and tulips. He sections off the soil into four equal parts and plants each type of flower in their own section. All flowers receive the same amount of sunlight throughout the day and he waters them all the same amount and at the same time daily. He records the growth of the flowers once a week for a month.

I need to know the dependant and independent variables, constants, control group, and experimental group!