Increasing the concentration of accumulated pollutant along food chain is

Options

A. Biomagnification
B. Bioaccumulation
C. Eutrophication
D. Biodiversity

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks about the phenomenon where the concentration of accumulated pollutants increases along the food chain.

2. **Identifying Key Terms**: The key terms in the question are "increasing concentration," "accumulated pollutant," and "food chain."

3. **Exploring the Options**:
- **Option 1: Bio-magnification**: This term refers to the process where the concentration of pollutants increases as you move up the food chain. Pollutants like pesticides and heavy metals accumulate in the tissues of organisms, particularly those at higher trophic levels.
- **Option 2: Bioaccumulation**: This refers to the accumulation of pollutants in a single organism, not necessarily related to the food chain.
- **Option 3: Eutrophication**: This is the enrichment of water bodies with nutrients, leading to algal blooms, and is not directly related to the food chain.
- **Option 4: Biodiversity**: This refers to the variety of life in a particular habitat and does not pertain to pollutant accumulation.

4. **Analyzing the Correct Option**: Based on the definitions:
- Bio-magnification is the correct term because it specifically describes the increase in concentration of pollutants as they move through different trophic levels in the food chain.

5. **Conclusion**: Therefore, the correct answer to the question is **bio-magnification**.