Continential drift explains

Options

A. Masss extinctions
B. Distribution of fosslis on earth
C. Geographical upheavals
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Continental Drift**: Continental drift is a hypothesis proposed by Alfred Wegener, which suggests that continents were once joined together as a single supercontinent called Pangaea and have since drifted apart.

2. **Identifying the Key Concepts**: The main idea of continental drift is that continents are not static; they move over geological time. This movement can explain various geological and biological phenomena.

3. **Evaluating the Options**:
- **Option 1: Mass Extinctions**: While continental drift may have contributed to some mass extinctions, it does not specifically explain them.
- **Option 2: Distribution of Fossils on Earth**: This is a significant aspect of continental drift. Fossils of the same species have been found on continents that are now widely separated, indicating that these continents were once connected.
- **Option 3: Geographical Upheavals**: Although continental drift can lead to geographical changes, it does not directly explain geographical upheavals.
- **Option 4: All of These**: Since not all previous options are correct, this option cannot be correct either.

4. **Conclusion**: The best answer to the question "Continental drift explains" is **Option 2: Distribution of Fossils on Earth**. This option directly correlates with Wegener's theory and provides evidence for the movement of continents.