Which of the following option correctly represent basis of stratification in Lake ?

Options

A. Mode of arrangement of various growth forms
B. Need of light
C. Species diversity
D. Type of soil

Answer

To solve the question regarding the basis of stratification in a lake, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Stratification**:
- Stratification refers to the layering or classification of different components within a system. In the context of a lake, it involves how different layers of water are formed based on certain factors.

2. **Identifying Factors Influencing Stratification**:
- The primary factors that influence stratification in lakes are temperature and light. The upper layer of the lake, known as the epilimnion, is warmed by sunlight, while the deeper layer, known as the hypolimnion, remains cooler.

3. **Analyzing the Options**:
- Option A: Mode of arrangement of various growth forms - This does not pertain to stratification, as it does not directly relate to temperature or light.
- Option B: Need of light and warmth - This is a key factor in stratification, as organisms are distributed according to the availability of light and temperature.
- Option C: Diversity of species - While diversity is important, it does not create layers in the water.
- Option D: Types of soil - Soil is not relevant in the context of water stratification.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Option B: Need of light and warmth**, as it directly relates to how organisms are arranged in layers based on temperature and light availability.