Final answer:
The cell wall is responsible for maintaining the shape of plant cells.
Step-by-step explanation:
In plant cells, the organelle that holds the shape and provides support is the cell wall. The vacuole, although important for functions such as storage, digestion, and waste removal, does not directly play a role in maintaining the shape of plant cells. The presence of a large central vacuole in plant cells can push the cell wall against the cell membrane, contributing to the overall shape, but the primary responsibility lies with the cell wall.
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