Parenchyma is the most abundant simple plant tissue and is present almost most of the places. In cambium and meristem tissue, there's presence of parenchyma.

Well Differentiated Plant Tissue
Parenchyma
- Parenchyma is a type of simple plant tissue.
- It is composed of living cells with thin cell walls and large intercellular spaces.
- The cells are loosely packed and have the ability to divide and differentiate.
- Parenchyma tissue is found in various parts of a plant, including leaves, stems, roots, and fruits.
- It functions in photosynthesis, storage, and secretion.
Apical Meristem
- Apical meristem is a type of meristematic tissue.
- It is located at the tips of roots and shoots.
- It is responsible for primary growth in plants, leading to the elongation of roots and shoots.
- Apical meristem contains undifferentiated cells that continuously divide and differentiate into various types of plant tissues.
Cambium
- Cambium is a type of meristematic tissue.
- It is found in the vascular region of plants, between the xylem and phloem.
- Cambium is responsible for secondary growth in plants, leading to an increase in girth.
- It contains undifferentiated cells that divide and differentiate into secondary xylem (wood) and secondary phloem (inner bark).
Conclusion
- Among the given options, parenchyma is a well differentiated plant tissue.
- Apical meristem and cambium are meristematic tissues responsible for growth and differentiation in plants.
- While they play important roles in plant development, they are not considered well differentiated tissues like parenchyma.