Why is frog called an amphibians animals?

Explanation

### Step-by-Step Solution:

1. **Definition of Amphibians**: Amphibians are a class of animals that can live both in water and on land. The term "amphibian" comes from the Greek words "amphi," meaning "both," and "bios," meaning "life."

2. **Characteristics of Frogs**: Frogs exhibit both terrestrial (land) and aquatic (water) characteristics. This duality is a key reason why they are classified as amphibians.

3. **Life Cycle**: Frogs undergo a unique life cycle that includes a larval stage (tadpole) that is aquatic. Tadpoles have fish-like tails and live in water, which indicates their evolutionary link to fish.

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