Why are chloroplasts aggregated at the periphery of the Elodea cells?

Question

I am doing an experiment involving Elodea cells and this question stumbled me. Please help me out with this. Thanks.

Answer 1

They are along the outside of the cell because the cells have a large central vacuole (full of water) that takes up the center of the cell.  The vacuole pushes the chloroplasts to the outside of the cell.