When any plane passing through the central axis of the body divides the organism into two identical halves , then this is called

Options

A. Radial symmetry
B. Bilateral symmetry
C. Central symmetry
D. Axial symmetry

Answer

To solve the question, we need to understand the concept of symmetry in organisms. The question states that when a plane passing through the central axis of the body divides the organism into two identical halves, we need to identify the correct term for this type of symmetry.

### Step-by-Step Solution:

1. **Understanding Symmetry**: Symmetry in biology refers to the balanced proportions of an organism's body. There are different types of symmetry, including radial symmetry and bilateral symmetry.

2. **Radial Symmetry**: This type of symmetry occurs when an organism can be divided into similar halves by multiple planes passing through a central axis. For example, organisms like jellyfish and starfish exhibit radial symmetry.

3. **Bilateral Symmetry**: This type of symmetry occurs when an organism can be divided into two identical halves along a single plane, creating a left and right side. Examples include humans and most animals.

4. **Identifying the Correct Term**: The question specifies that any plane passing through the central axis divides the organism into two identical halves. This description aligns with radial symmetry, as it allows for multiple planes of division.

5. **Evaluating Other Options**:
- **Central Symmetry**: This term is not commonly used in biological contexts.
- **Axial Symmetry**: This term is also not standard in describing organism symmetry.

6. **Conclusion**: Based on the definitions and explanations, the correct answer to the question is **radial symmetry**.

### Final Answer:
**Radial Symmetry**