The correct answer is option 4, Lysosome. Lysosomes are known as the "digestive bags" in the cell because they contain enzymes that break down foreign substances, old cell parts, and waste materials. They function as the cell`s recycling center, breaking down these materials into smaller molecules that can be reused or eliminated from the cell.

Option 1, Golgi body, is responsible for processing and packaging proteins and lipids, but it does not have the function of breaking down substances like lysosomes do.

Option 2, Mitochondrion, is responsible for producing energy in the form of ATP through cellular respiration. While it plays a vital role in the cell`s metabolism, it is not involved in digestion.

Option 3, Ribosomes, are responsible for protein synthesis in the cell. They are not directly involved in digestion and do not contain enzymes for breaking down substances.

In conclusion, lysosomes are called the "digestive bags" in the cell because they contain enzymes that break down foreign substances, old cell parts, and waste materials.