Natural classification is the best classification system because :

Options

A. It involves few vegetative characters.
B. It involves only two morphologital characters.
C. It involves complete morphological characters.
D. It involves the economic importance of the plants.

Answer

**Step-by-Step Solution:**

1. **Understanding Natural Classification**: Natural classification is a system that categorizes organisms based on a wide range of characteristics, including both external and internal features. This system aims to reflect the evolutionary relationships among organisms.

2. **Key Features of Natural Classification**:
- It considers various morphological characters (both vegetative and reproductive).
- It includes internal features such as anatomical structures.
- It incorporates embryological data, which provides insights into the developmental processes of plants.
- It also takes into account phytochemical properties, which refer to the chemical compounds produced by plants.

3. **Comparison with Other Classification Systems**: Unlike artificial classification systems that may focus on a limited number of traits (like vegetative characters or a few morphological traits), natural classification provides a more comprehensive view by considering a broader spectrum of characteristics.

4. **Conclusion**: Given that natural classification encompasses complete morphological characters, along with other important biological aspects, it is considered the best classification system. Therefore, the correct answer to the question is that natural classification involves complete morphological characters.

**Final Answer**: Natural classification is the best classification system because it involves complete morphological characters.

---