Which stage comes earlier in the life of a star?

Options

A. Protostar
B. Neutron
C. Supernova
D. Nebula

Explanation

**Step-by-Step Solution:**

1. **Understanding the Life Cycle of a Star**: The life cycle of a star begins with the formation of a nebula, which is a large cloud of gas and dust in space.

2. **Identifying the Stages**: The options provided are:
- Option 1: Protostar
- Option 2: Neutron
- Option 3: Supernova
- Option 4: Nebula

3. **Analyzing Each Option**:
- **Supernova**: This is an explosion that occurs at the end of a star's life cycle, making it the last stage. Therefore, it cannot be the earlier stage.
- **Neutron**: This likely refers to a neutron star, which is also a late-stage object formed after a supernova. Thus, it is not an early stage.
- **Protostar**: This is the stage that follows the nebula, where the gas and dust begin to condense and form a star. It is not the earliest stage.
- **Nebula**: This is the initial stage where stars are born from clouds of gas and dust. It is the correct answer as it represents the earliest stage in the life of a star.

4. **Conclusion**: The correct answer is **Option 4: Nebula**, as it is the stage that comes earlier in the life of a star.

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