Final answer:
An organelle is a membrane-bound structure within a eukaryotic cell's cytoplasm that performs a specific function, analogous to an organ in a body. option 2 is the correct answer.
Step-by-step explanation:
An organelle is a structure within the cytoplasm of a eukaryotic cell that is enclosed within a membrane and performs a specific job.
Eukaryotic cells contain various organelles, each with a specialized function, much like organs within a living organism. For example, mitochondria provide energy to power the cell, while chloroplasts enable green plants to convert sunlight into sugars.
Unlike prokaryotic cells, eukaryotic cells have membrane-bound organelles and a nucleus. Therefore, the second option is the correct answer: An organelle is a membrane-bound structure that performs specific functions within a cell.