The organelle that stores food, water, and waste is called the vacuole.

Here's a breakdown of its functions:

* Food: Vacuoles can store nutrients and sugars, providing energy for the cell.

* Water: They regulate the water balance within the cell, keeping it hydrated and maintaining its shape.

* Waste: Vacuoles can also store waste products, preventing them from harming the cell.

While vacuoles are important in all cells, they are especially large and prominent in plant cells.