Non-functional wings occur in

Options

A. Emu, Owl and Dodo
B. Ostrich, Kiwi and Stork
C. Kiwi, Emu and Ostrich
D. Rhea, Eagle and Cassowary

Answer

To solve the question "Non-functional wings occur in," we need to identify which of the given options contain birds that have wings that do not serve the purpose of flight. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the concept of functional and non-functional wings
- **Functional wings** are those that are used for flying.
- **Non-functional wings** are those that do not aid in flight, often seen in flightless birds.

### Step 2: Analyze the options provided
1. **Emu, Owl, and Dodo**:
- Emu: Non-functional wings (flightless bird).
- Owl: Functional wings (can fly).
- Dodo: Non-functional wings (extinct flightless bird).
- **Conclusion**: Contains both functional and non-functional wings.

2. **Ostrich, Kiwi, and Stork**:
- Ostrich: Non-functional wings (flightless bird).
- Kiwi: Non-functional wings (flightless bird).
- Stork: Functional wings (can fly).
- **Conclusion**: Contains both functional and non-functional wings.

3. **Kiwi, Emu, and Ostrich**:
- Kiwi: Non-functional wings (flightless bird).
- Emu: Non-functional wings (flightless bird).
- Ostrich: Non-functional wings (flightless bird).
- **Conclusion**: All three have non-functional wings.

4. **Rhea, Eagle, and Cassowary**:
- Rhea: Non-functional wings (flightless bird).
- Eagle: Functional wings (can fly).
- Cassowary: Non-functional wings (flightless bird).
- **Conclusion**: Contains both functional and non-functional wings.

### Step 3: Identify the correct option
From the analysis:
- The only option that contains only birds with non-functional wings is **Kiwi, Emu, and Ostrich**.

### Final Answer:
**Kiwi, Emu, and Ostrich** are the birds that have non-functional wings.

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