Select the correct statement regarding population interaction.

Options

A. Commensalism when none of the interacting populations affect each other
B. Symbiosis when the interaction is useful to both the populations .
C. Protocooperation when one population
D. Amensalism when the interaction is useful to the populations

Answer

To solve the question regarding population interaction, we need to analyze the provided statements about different types of interactions between populations. Here’s the step-by-step solution:

### Step 1: Understand the Types of Population Interactions
We need to identify and understand the definitions of the different types of population interactions mentioned in the statements.

### Step 2: Analyze Each Statement
1. **Commensalism**: This interaction occurs when one species benefits while the other is neither helped nor harmed.
- **Example**: A bird nesting in a tree (the bird benefits, the tree is unaffected).

2. **Symbiosis (Mutualism)**: This interaction is beneficial to both species involved.
- **Example**: Algae and fungi in lichen (both benefit from the relationship).

3. **Proto-cooperation**: Similar to mutualism, both species benefit, but the interaction is not essential for their survival.
- **Example**: Certain fish and sea anemones (both benefit but can survive independently).

4. **Amensalism**: In this interaction, one species is harmed while the other is unaffected.
- **Example**: Penicillium fungus inhibiting bacterial growth (the fungus is unaffected while the bacteria are harmed).

### Step 3: Identify the Correct Statement
Now, we need to determine which statement is correct based on our analysis:
- The correct statement is about **Symbiosis**, which is when the interaction is useful to both populations.

### Conclusion
Thus, the correct answer to the question is:
**Symbiosis when the interaction is useful to both the population.**

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