Pith Role in Nutrient Storage

The pith is the central region found in the stems and roots of vascular plants. It is primarily composed of spongy, soft parenchyma cells.

These parenchyma cells are crucial for storing food reserves (nutrients) and water for the plant. They can also play a role in transporting substances throughout the plant.

Why Other Options Are Incorrect

• Cortex: While also made of parenchyma cells, the cortex is located between the epidermis and the vascular tissue, typically functioning in photosynthesis and storage, but the central region described is the pith.
• Metaxylem: This is a specific type of xylem tissue responsible for water and mineral transport, not the general storage tissue described.
• Stele: This is the collective term for the central vascular cylinder, which includes the xylem, phloem, and potentially the pith and pericycle. The question specifically asks for the tissue type known for spongy parenchyma cells involved in storage and transport within this central region.

Therefore, the pith best fits the description of spongy, soft parenchyma cells carrying and storing nutrients.