Verbalization is best defined as

Options

A. All changes that an organism goes through during its life cycle .
B. Flowering is either quantitatively or qualitative dependent on exposure to low temperature.
C. Flowering induced by altering nutrient supply
D. Presence of different kinds of structure im response to environment or phases of life.

Answer

To solve the question regarding the definition of vernalization, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Vernalization**:
- Vernalization refers to the process by which certain plants require a period of cold temperatures to trigger flowering. This is particularly important for plants that bloom in spring after winter.

2. **Analyzing the Options**:
- **Option 1**: "All changes that an organism goes through during its life cycle."
- This describes the concept of development or life cycle changes, not specifically vernalization.
- **Option 2**: "Flowering is either quantitatively or qualitatively dependent on exposure to low temperature."
- This option directly relates to the definition of vernalization, as it emphasizes the dependence of flowering on low temperatures.
- **Option 3**: "Flowering induced by altering nutrient supply."
- This option pertains to nutrient management and does not relate to temperature effects.
- **Option 4**: "Presence of different kinds of structure in response to environment or phases of life."
- This describes environmental adaptations but does not specifically address vernalization.

3. **Identifying the Correct Answer**:
- Based on the analysis, **Option 2** is the most accurate definition of vernalization, as it highlights the relationship between flowering and exposure to low temperatures.

4. **Conclusion**:
- Therefore, the best definition of vernalization is: "Flowering is either quantitatively or qualitatively dependent on exposure to low temperature."

### Final Answer:
**Option 2**: Flowering is either quantitatively or qualitatively dependent on exposure to low temperature.