Stratification is present in

Options

A. desert
B. grasslands
C. trophical rain forest
D. both (2) and (3)

Answer

To answer the question "Stratification is present in," we need to understand what stratification means in the context of ecosystems.

### Step-by-Step Solution:

1. **Define Stratification**: Stratification refers to the layering that occurs in various ecosystems. It is a concept that can be observed in both aquatic and terrestrial environments. In terrestrial ecosystems, stratification can be seen in forests where different layers of vegetation exist (e.g., canopy, understory, forest floor).

2. **Identify Ecosystems with Stratification**:
- **Forests**: In forest ecosystems, there are distinct layers such as the canopy (top layer), understory (middle layer), and forest floor (bottom layer). Each layer hosts different species of plants and animals adapted to that specific environment.
- **Aquatic Ecosystems**: In aquatic ecosystems, stratification can occur in lakes and oceans where different layers exist based on temperature, light penetration, and depth. For example, in lakes, you may find the epilimnion (warm upper layer), metalimnion (thermocline), and hypolimnion (cold bottom layer).

3. **Conclusion**: Stratification is present in both terrestrial ecosystems (like forests) and aquatic ecosystems (like lakes and oceans). Therefore, the answer to the question is that stratification is present in both types of ecosystems.

### Final Answer:
Stratification is present in both terrestrial ecosystems (like forests) and aquatic ecosystems (like lakes and oceans).

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