C) Chloroplast should be your answer.
The most important characteristic of plants is their ability to photosynthesize.
Answer:
An acid increases the hydrogen ion concentration in a solution, while a base decreases the hydrogen ion concentration. pH is used to measure the concentration of H+ ions ([H+]) and therefore, whether a substance is acidic or basic (alkaline).
Explanation:
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C, because it protects the cell from the outside environment
