Amphibians originated during

Options

A. Silurian period
B. Devonian period
C. Carboniferous period
D. Jurassic period

Answer

To determine when amphibians originated, we can analyze the options provided:

1. **Laurian Period**: This period is primarily known for the diversification of fish. It does not mark the origin of amphibians.

2. **Devonian Period**: This is the key period we are interested in. The Devonian period is recognized as the time when amphibians first originated. This is the correct answer.

3. **Carboniferous Period**: While amphibians were at their peak during this time, it is not when they first originated. The Carboniferous period followed the Devonian.

4. **Jurassic Period**: This period is known for the emergence of many new dinosaurs and does not relate to the origin of amphibians.

Based on this analysis, the correct answer is the **Devonian Period**, as it is the time when amphibians first appeared.

### Step-by-Step Solution:
1. **Identify the options**: Look at the four periods provided: Laurian, Devonian, Carboniferous, and Jurassic.
2. **Analyze each period**:
- Laurian: Diversification of fish.
- Devonian: Origin of amphibians.
- Carboniferous: Peak of amphibians, but not their origin.
- Jurassic: Emergence of dinosaurs.
3. **Select the correct period**: The Devonian period is when amphibians originated.
4. **Conclude**: The correct answer is the Devonian Period.