Accumulation of toxic substance in living organism is called as :-

Options

A. Eutrophication
B. Biomagnification
C. Bioprospecting
D. Biofortification

Answer

To solve the question regarding the accumulation of toxic substances in living organisms, we will analyze the provided options step by step.

### Step 1: Understand the Question
The question asks for the term that describes the accumulation of toxic substances in living organisms. We need to evaluate the options given.

### Step 2: Analyze the Options
The options provided are:
1. Eutrophication
2. Biomagnification
3. Bioprospecting
4. Biofortification

### Step 3: Define Each Term
- **Eutrophication**: This refers to the process where water bodies become enriched with nutrients (such as nitrogen and phosphorus), leading to excessive growth of algae and depletion of oxygen.

- **Biomagnification**: This is the process where the concentration of toxic substances increases in organisms at each successive level of the food chain. It occurs when organisms absorb these substances from their environment and food, leading to higher concentrations in predators.

- **Bioprospecting**: This is the exploration of biodiversity for new resources, particularly for medicinal drugs and other valuable compounds.

- **Biofortification**: This refers to the process of breeding crops to enhance their nutritional value.

### Step 4: Identify the Correct Answer
From the definitions:
- Eutrophication does not relate to toxic substance accumulation.
- Bioprospecting and biofortification are not related to the accumulation of toxins either.
- Biomagnification specifically refers to the accumulation of toxic substances in organisms through the food chain.

Thus, the correct answer is **Biomagnification**.

### Final Answer
The accumulation of toxic substances in living organisms is called **Biomagnification**.

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