An interaction between two individuals where one is benefitted while the other is neither benefitted nor harmed is called as

Options

A. predation
B. symbiosis
C. amensalism
D. Commensalism

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a type of interaction between two individuals where one benefits and the other is neither helped nor harmed.

2. **Identifying Types of Interactions**: In ecology, there are various types of interactions between species, including:
- **Commensalism**: One species benefits while the other is unaffected.
- **Mutualism**: Both species benefit from the interaction.
- **Predation**: One species benefits at the expense of the other (the prey is harmed).
- **Amensalism**: One species is harmed while the other is unaffected.

3. **Analyzing the Options**:
- **Predation**: This cannot be the answer because it harms the prey.
- **Mutualism**: This is also not the answer since both parties benefit.
- **Amensalism**: This involves one species being harmed and the other unaffected, which does not fit the criteria.

4. **Identifying the Correct Interaction**: The only interaction that fits the criteria of one species benefiting while the other is unaffected is **commensalism**.

5. **Providing an Example**: A common example of commensalism is the relationship between the cattle egret bird and cattle (like cows). The cattle egret benefits by feeding on insects stirred up by the grazing cattle, while the cattle are neither helped nor harmed by the presence of the bird.

6. **Conclusion**: Therefore, the interaction described in the question is called **commensalism**.

### Final Answer:
**Commensalism**

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