The correct answer is <u><em>B. Cell Wall</em></u>
Explanation:
A <u><em>cell wall</em></u> is a rigid layer that is found outside the cell membrane and surrounds the cell. The cell wall contains not only cellulose and protein, but other polysaccharides as well. The cell wall provides structural support and protection. Pores in the cell wall allow water and nutrients to move into and out of the cell.
The dependent variable would be anything that is not consistent. So outside factors such as how much sun and the environment that the plant is contained in.
