Final answer:
The parenchyma cell is the specialized cell that makes up the majority of the interior of a non-woody plant, involved in photosynthesis, wound repair, and sometimes starch storage.
Step-by-step explanation:
The specialized plant cell that forms the bulk of a non-woody plant is the parenchyma cell. Parenchyma cells are the most common plant cells and are found in various parts of the plant including the stem, root, inside of the leaf, and the pulp of the fruit. They are essential for metabolic functions such as photosynthesis, repairing wounds, and in some cases, storing starch. They have primary cell walls, which are much less resistant to external forces compared to the lignified secondary walls found in sclerenchyma cells, usually associated with woody plants or parts of plants that require extra support.