Food, water, and wastes are stored inside

For the answer to the question above, it is Vacuoles.
A cell is a tiny world of elements, one of which is the vacuole. Found in both plant and animal cells, a vacuole is a fluid-filled pocket in the cell's cytoplasm that serves varying functions depending on the cell's requirements.
I hope my answer helped.

Closing a ring restricts the rotation around individual car bon carbon bonds hope it will you !

They are both used to view parts of the cell