The answer is b, chloroplast.
OK so the phase you are looking for will be Metaphase I
The vacuole usually acts as storage for materials needed by the cell.
Answer:
Isotonic
denoting or relating to a solution having the same osmotic pressure as some other solution, especially one in a cell or a body fluid.
Hypertonic
having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid
Hypotonic
having a lower osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
Explanation: