What are the storage spaces within a cell known as?

Vacuoles are specialized storage spaces within a cell that primarily hold various substances. These can include nutrients, waste products, or other materials necessary for the cell's functions. In plant cells, vacuoles are often larger and help in maintaining turgor pressure, which is vital for keeping the cell rigid and supporting the overall structure of the plant.

In contrast, ribosomes are the cellular structures responsible for protein synthesis, while the Golgi apparatus is involved in processing and packaging proteins and lipids for secretion or use within the cell. Lysosomes contain enzymes that break down waste materials and cellular debris, but they do not serve as storage spaces like vacuoles do. Thus, the unique function of vacuoles as storage spaces makes the correct answer evident.