Why are three parts of legs of frog folded in Z-form?

Explanation

**Step-by-Step Solution:**

1. **Observation of Frog Legs**: When examining the legs of a frog, one can notice that they are structured in a Z-form. This unique shape is not just for aesthetics but serves a functional purpose.

2. **Nature of Frogs**: Frogs are known for their leaping ability. They are adapted to jump and move quickly from one location to another, which is essential for their survival, whether for escaping predators or catching prey.

3. **Function of Z-Form**: The Z-form structure of the legs allows for greater flexibility and extension. When a frog prepares to jump, the Z-form enables the legs to stretch significantly, which is crucial for generating the force needed for a powerful leap.

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