The small groups of planetary pieces which are confined and revolving between Mars and Jupiter are called:

Options

A. meteors
B. comet
C. celestial bodies
D. asteroids

Explanation

To solve the question, "The small groups of planetary pieces which are confined and revolving between Mars and Jupiter are called:", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The question is asking about small groups of planetary pieces located between two specific planets, Mars and Jupiter.

2. **Understand the Options**: The provided options are:
- A) Meteors
- B) Comet
- C) Celestial bodies
- D) Asteroids

3. **Analyze Each Option**:
- **Meteors**: These are typically small particles that burn up upon entering Earth's atmosphere, not confined between Mars and Jupiter.
- **Comet**: Comets are icy bodies that release gas or dust and are not specifically small rocky pieces located between Mars and Jupiter.
- **Celestial Bodies**: This is a broad term that includes all objects in space, so it does not specifically answer the question.
- **Asteroids**: These are small rocky objects that orbit the Sun, primarily found in the asteroid belt between Mars and Jupiter.

4. **Select the Correct Answer**: Based on the analysis, the small groups of planetary pieces confined and revolving between Mars and Jupiter are called **Asteroids**.

5. **Final Answer**: Therefore, the correct answer is **D) Asteroids**.