DDT content in the water of a lake that supplies drinking water to the nearby villages is found to be 0.033 ppm. The kingfishers of that area reported to have 2 ppm of DDT. This phenomenon is known as :

Options

A. Cultured Eutrophication
B. Global warming
C. Biomagnification
D. Eutrophication

Answer

To solve the question regarding the DDT content in the water and the kingfishers, we need to analyze the information provided and understand the concept behind it.

### Step-by-Step Solution:

1. **Understanding the DDT Levels**:
- The DDT concentration in the lake water is 0.033 ppm (parts per million).
- The DDT concentration in the kingfishers is reported to be 2 ppm.

2. **Identifying the Phenomenon**:
- The question asks us to identify the phenomenon where the concentration of a substance (in this case, DDT) increases as it moves up the food chain.

3. **Concept of Biomagnification**:
- Biomagnification refers to the process where the concentration of a toxic substance increases in the tissues of organisms at each successive level of the food chain.
- In this scenario, the kingfishers, which are higher up in the food chain, have a much higher concentration of DDT than what is found in the water or in the lower trophic levels (like zooplankton or small fish).

4. **Conclusion**:
- Since the concentration of DDT is significantly higher in the kingfishers compared to the water, this indicates that the DDT is accumulating in the organisms as they consume other organisms that have also accumulated DDT.
- Therefore, the phenomenon described in the question is known as **biomagnification**.

5. **Final Answer**:
- The correct answer is **C. biomagnification**.