age of amphibians is

Options

A. carboniferous
B. ordocician
C. devonian
D. cambrain

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the age of amphibians among the given geological periods: Carboniferous, Ordovician, Devonian, and Cambrian.

2. **Identifying the Correct Period**:
- The Carboniferous period is recognized as the age of amphibians. During this time, amphibians became the dominant land vertebrates.
- The name "Carboniferous" refers to coal-bearing, indicating that this period was significant for the formation of coal deposits.

3. **Examining Other Options**:
- **Ordovician**: This period is known as the age of vertebrates, but it is not specifically associated with amphibians.
- **Devonian**: This period is known as the age of fishes, highlighting the dominance of fish during this time.
- **Cambrian**: This is the first period of the Paleozoic era, characterized by the presence of arthropods and other invertebrates, not amphibians.

4. **Conclusion**: Based on the analysis, the correct answer is the Carboniferous period, as it is specifically recognized as the age of amphibians.

### Final Answer:
The age of amphibians is the **Carboniferous** period.

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