A cell is like a city. They both have parts that play different roles. A cell is microscopic that has organelles, and a city has different services. Keeping them both running smoothly and orderly. As a result they both survive and grow.
There’re a lot of different organelles in a cell that are similar to a city for example the cell membrane borders and protects the cell it’s role is letting certain things in and out of the cell in the same way a border in a city does. Another organelle is the vacuole which stores water for later use like a water tank or reservoir in a city. Another one is the nucleus, it’s a large organelle found in most cells except bacterial cells its job is to control all cell functions, it’s the head of the cell also like city hall or the mayor. In addition the Golgi Bodies or Golgi Apparatus modifies, stores, and directs the movement of molecules made by ER (Endoplasmic Reticulum) in the same way the mail delivery does in a city. Lastly, is the mitochondrion which transforms the unusable energy in food molecules into a form of usable energy likewise a power plant or PG&E do in a city.
As you see a cell and a city have a lot in common overall. They both have objects that keep them both running and alive. If there wasn’t 1 of these objects found in both of them, they wouldn’t be complete and would just fall apart. Like a puzzle missing a piece.