The interaction between cuckoo and crow is an example of

Options

A. competition
B. Proto-cooperation
C. brood parasitism
D. mutualism

Answer

To solve the question regarding the interaction between cuckoo and crow, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the type of interaction between cuckoo and crow.

**Hint**: Identify the nature of the relationship between the two species.

2. **Identifying the Interaction**: The cuckoo is known for its unique reproductive strategy where it does not build its own nest. Instead, it lays its eggs in the nests of other birds, such as crows.

**Hint**: Think about how one species uses another for reproductive success.

3. **Defining Brood Parasitism**: This behavior is specifically known as brood parasitism. In this case, the cuckoo benefits by having its eggs incubated by the crow, while the crow unknowingly raises the cuckoo's young.

**Hint**: Consider what happens to the eggs and the young birds after they hatch.

4. **Analyzing the Relationship**: In this interaction, the cuckoo gains a reproductive advantage (positive effect), while the crow is neither harmed nor benefited significantly (neutral effect). Therefore, this is classified as a plus-zero relationship.

**Hint**: Reflect on whether both species benefit from the interaction or if one is taking advantage of the other.

5. **Excluding Other Options**:
- **Competition**: This is a negative-negative relationship where both species compete for resources.
- **Mutualism**: A relationship where both species benefit (plus-plus).
- **Proto-cooperation**: A less strict form of mutualism that is still beneficial for both (plus-plus).

**Hint**: Compare the characteristics of the interactions to determine which one fits the cuckoo-crow relationship.

6. **Conclusion**: Based on the definitions and analysis, the interaction between cuckoo and crow is best described as brood parasitism.

**Hint**: Summarize the findings to confirm the correct answer.

### Final Answer:
The interaction between cuckoo and crow is an example of **brood parasitism**.