Pigeon and kangaroo are similar to each other in the following aspect ?

Options

A. Homeothermy
B. Toothless jaws
C. Functional post-anal tail
D. Oviparity

Explanation

To solve the question regarding the similarities between pigeons and kangaroos, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Classes of the Animals**:
- Pigeons belong to the class Aves (birds).
- Kangaroos belong to the class Mammalia (mammals).

2. **Understand Key Characteristics of Each Class**:
- Birds (Aves) have adaptations for flight, such as feathers and lightweight bones.
- Mammals (Mammalia) have mammary glands for nursing their young and typically have hair or fur.

3. **Look for Common Features**:
- We need to find a characteristic that is common to both pigeons and kangaroos.

4. **Evaluate the Given Options**:
- **Homeothermy**: This is the ability to maintain a constant internal body temperature regardless of external conditions. Both pigeons and kangaroos are homeothermic (warm-blooded).
- **Toothless Jaws**: This is a characteristic of birds, not mammals like kangaroos.
- **Functional Post-Anal Tail**: This feature is present in birds but not in kangaroos.
- **Oviparity**: This refers to egg-laying, which is a characteristic of birds. Kangaroos are viviparous (give birth to live young).

5. **Conclusion**:
- The only common characteristic between pigeons and kangaroos is homeothermy. Therefore, the correct answer is that both animals are similar in their ability to maintain a constant internal body temperature.

### Final Answer:
Pigeon and kangaroo are similar to each other in the aspect of **homeothermy** (the ability to maintain a constant internal body temperature).

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