The correct answer is: D. Pericycle
The pericycle is a layer of cells between the endodermis and the vascular bundles in the stele of a plant. It is a single layer of cells in most dicots, but it can be several layers thick in some monocots. The pericycle is responsible for the production of lateral roots and the formation of new vascular bundles.
The hypodermis is the outermost layer of cells in the cortex. It is a single layer of cells that is usually made up of thick-walled cells. The hypodermis protects the plant from mechanical damage and helps to regulate water loss.
The cortex is the region of the plant between the epidermis and the stele. It is made up of several layers of cells that are involved in storage, photosynthesis, and transport.
The pith is the central region of the stem or root. It is made up of parenchyma cells that are involved in storage and photosynthesis.
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