Amphibians evolved in

Options

A. sea
B. fresh water
C. on banks of fresh water
D. land.

Answer

**Step-by-Step Solution:**

1. **Understanding Amphibians**: Amphibians are a class of animals that include frogs, toads, salamanders, and newts. They are known for their dual life, spending part of their life cycle in water and part on land.

2. **Habitat of Evolution**: Amphibians are believed to have evolved in freshwater environments. This is crucial as their life cycle typically begins in aquatic habitats.

3. **Life Cycle**: The early stages of amphibians, such as eggs and larvae (tadpoles), are aquatic. They require water for reproduction and to support their early development.

4. **Adaptation to Land**: As amphibians mature, they develop adaptations such as lungs and limbs, allowing them to transition from an aquatic environment to a terrestrial one. This adaptation is essential for their survival on land.

5. **Conclusion**: Given their evolutionary history and life cycle, amphibians evolved in freshwater ecosystems, particularly on the banks of freshwater bodies where they could thrive both in water and on land.

6. **Final Answer**: Therefore, the correct answer is that amphibians evolved in freshwater ecosystems, specifically on the banks of freshwater.

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