What is common between parrot, platypus and kangaroo ?

Options

A. Toothless jaws
B. Functional postanal tail
C. Oviparity
D. Homoiothermy

Explanation

To determine what is common between a parrot, a platypus, and a kangaroo, we need to analyze the characteristics of each animal and identify a shared feature. Here’s the step-by-step solution:

### Step 1: Identify the Animals
- **Parrot**: A bird known for its colorful feathers and ability to mimic sounds.
- **Platypus**: A unique mammal that lays eggs and has a duck-bill.
- **Kangaroo**: A marsupial known for its powerful hind legs and pouch for carrying young.

### Step 2: Analyze Their Characteristics
- **Toothless Jaws**: This feature is present in parrots but not in platypus or kangaroo.
- **Functional Post-Tail**: This is a characteristic of kangaroos, not applicable to parrots or platypus.
- **Oviparity**: This refers to laying eggs. While the platypus is oviparous, parrots and kangaroos are not.
- **Homeothermy**: This is the ability to maintain a constant internal body temperature regardless of external conditions.

### Step 3: Identify the Common Feature
- Among the characteristics analyzed, **homeothermy** is the only feature that is common to all three animals (parrot, platypus, and kangaroo). All these animals can regulate their body temperature through metabolic processes, which allows them to maintain a stable internal environment despite changes in the external temperature.

### Conclusion
The common feature between parrot, platypus, and kangaroo is **homeothermy**.

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