The cell organelle that stores materials like water, salt, proteins, and carbohydrates is called the vacuole.

Here's why:

* Vacuoles are membrane-bound sacs within the cytoplasm of a cell.

* They are primarily involved in storing various substances, including water, ions (like salt), nutrients (proteins and carbohydrates), and waste products.

* The size and number of vacuoles can vary significantly depending on the type of cell and its function.

Let me know if you'd like to learn more about vacuoles or other cell organelles!