Which component is found only in plant cells?

The presence of a cell wall is a defining feature of plant cells. The cell wall is primarily composed of cellulose and serves several crucial functions including providing structural support, protecting the cell, and regulating the growth of the plant. In contrast, animal cells do not possess a cell wall; instead, they have a flexible cell membrane that allows for a greater variety of shapes and movements.

While other components, such as vacuoles and lysosomes, can be present in both plant and animal cells, they differ significantly in appearance and function in each type. Plant cells typically have a large central vacuole that stores substances and helps maintain turgor pressure, while lysosomes, involved in waste breakdown, are more commonly associated with animal cells. Therefore, the unique presence of the cell wall in plant cells is what makes it the correct answer.