Phenomenon involved in increasing the concentration of non-degradable pollutants in a trophic level of an ecosystem is called :

Options

A. Biodegradation
B. Biomineralization
C. Bioaccumulation
D. Biomagnification

Answer

To answer the question regarding the phenomenon involved in increasing the concentration of non-degradable pollutants in a trophic level of an ecosystem, we can follow these steps:

### Step 1: Understand the Terms
- **Biodegradation**: This is the process where living organisms, such as bacteria and fungi, break down complex organic matter into simpler substances. This is not related to the accumulation of pollutants.

- **Biomineralization**: This refers to the process where organic matter is decomposed, and the chemicals are transformed into forms that are easily available for plants. This also does not pertain to pollutant concentration.

- **Bioaccumulation**: This is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism. While it involves accumulation, it does not specifically address the increase in concentration across trophic levels.

### Step 2: Identify the Correct Concept
- **Biomagnification**: This is the correct phenomenon we are looking for. It refers to the process where the concentration of non-degradable pollutants increases as you move up the food chain or trophic levels. For instance, if a toxic substance like DDT or mercury enters the food chain, its concentration becomes higher in organisms at higher trophic levels compared to those at lower levels.

### Step 3: Conclusion
Based on the definitions and explanations, the phenomenon involved in increasing the concentration of non-degradable pollutants in a trophic level of an ecosystem is called **biomagnification**.

### Final Answer
**Biomagnification**

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