Metalimnion is

Options

A. Upper layer of lake
B. Lower layer of lake
C. Middle transition zone
D. Base of lake.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Layers of a Lake:**
- A lake is typically divided into three main layers based on temperature and light penetration:
- **Epilimnion:** This is the upper layer of the lake, where the water is warm and well-lit.
- **Metalimnion:** This is the middle layer, also known as the thermocline, where there is a rapid change in temperature.
- **Hypolimnion:** This is the bottom layer of the lake, which is colder and denser.

2. **Defining Metalimnion:**
- The metalimnion is specifically the transition zone between the warmer epilimnion above and the colder hypolimnion below. It is characterized by a significant temperature gradient.

3. **Identifying the Correct Option:**
- Given the options, the correct answer to the question "Metalimnion is" would be:
- **Metalimnion is a region of a lake.**

4. **Conclusion:**
- Therefore, the metalimnion is defined as the middle transition zone in a lake that separates the upper warm layer (epilimnion) from the lower cold layer (hypolimnion).

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