The Earth has the size among all the plan ets:

Options

A. fifth
B. third
C. fourth
D. seventh

Explanation

To determine the size of Earth among all the planets in our solar system, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Planets in the Solar System**:
The eight planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

2. **Understand the Size of Each Planet**:
- Mercury: Smallest planet
- Venus: Similar in size to Earth but slightly smaller
- Earth: Approximately 8,000 miles in diameter
- Mars: Smaller than Earth
- Jupiter: Largest planet
- Saturn: Second largest planet
- Uranus: Third largest planet
- Neptune: Fourth largest planet

3. **Rank the Planets by Size**:
- 1st: Jupiter
- 2nd: Saturn
- 3rd: Uranus
- 4th: Neptune
- 5th: Earth
- 6th: Venus
- 7th: Mars
- 8th: Mercury

4. **Conclusion**:
Based on the ranking, Earth is the **fifth largest planet** in the solar system.

### Final Answer:
The Earth is the **fifth largest planet** among all the planets.

---