Before how many years dinosaurs suddenly disappeared from earth?

Options

A. 320 mya
B. 350 mya
C. 200 mya
D. 65 mya

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the time frame in which dinosaurs suddenly disappeared from Earth.

2. **Analyzing the Options**: The options provided are:
- 320 million years ago
- 350 million years ago
- 200 million years ago
- 65 million years ago

3. **Identifying Key Historical Events**: It's important to recall significant events in Earth's history, particularly those related to the extinction of dinosaurs.

4. **Recalling Extinction Events**: The most widely accepted theory regarding the extinction of dinosaurs points to a catastrophic event that occurred approximately 65 million years ago. This event is often attributed to a large meteoroid impact that drastically altered the climate.

5. **Considering Other Factors**: In addition to the meteoroid impact, volcanic activity and diseases also contributed to the extinction of dinosaurs, leading to their inability to survive in the changed environment.

6. **Selecting the Correct Answer**: Based on the historical data and the catastrophic events that occurred, the correct answer to the question is that dinosaurs disappeared about **65 million years ago**.

**Final Answer**: Dinosaurs suddenly disappeared from Earth about **65 million years ago**.

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