You water three sunflower plants with salt water. Each plant receives a different concentration of salt solutions. A fourth plant receives pure water. After a two-week period, the height is measured. i think the indepent variable is sunflower ... variable is height measured and the control variable is the fourth plant.
I think it's B because waxing crescent and first quarter is a small part of the full moon
It has a huge roll and lol go learn bio
