Here's how to break down the differences between plant and animal cells to help you identify the distinguishing feature:

* Cell Wall: Plant cells have a rigid cell wall made of cellulose, which provides structural support and protection. Animal cells do not have a cell wall.

Therefore, the correct answer is the presence of a cell wall.

Here are some other differences between plant and animal cells:

* Chloroplasts: Plant cells contain chloroplasts, which are responsible for photosynthesis. Animal cells do not have chloroplasts.

* Vacuoles: Plant cells have a large central vacuole that stores water and other substances. Animal cells may have smaller vacuoles.

* Centrioles: Animal cells have centrioles, which are involved in cell division. Plant cells usually do not have centrioles.