Which of the following is a Natatorial adaptation

Options

A. presence of adhesive discs
B. presence of feathers on body
C. strong shoulders
D. streamlined body

Explanation

### Step-by-Step Solution:

1. **Understanding Adaptation**:
- Adaptation refers to any body part, feature, or behavior that helps an organism survive and function better in its environment.

2. **Defining Natatorial Adaptation**:
- Natatorial adaptation is a specific type of adaptation that occurs in organisms living in aquatic environments. It is also known as aquatic adaptation.

3. **Identifying Characteristics of Natatorial Adaptation**:
- These adaptations help organisms survive and function effectively in water. Examples include:
- Presence of fins in fish.
- Paddle-like limbs in some reptiles.
- Gills for respiration in aquatic animals.
- A streamlined body shape to reduce water resistance.

4. **Evaluating the Options**:
- The question provides four options:
1. Presence of prosthesis
2. Presence of feathers on the body
3. Strong shoulders
4. Streamlined body
- Now, we need to determine which of these is a natatorial adaptation.

5. **Analyzing Each Option**:
- **Presence of prosthesis**: Not related to aquatic adaptation.
- **Presence of feathers on the body**: Typical of birds, not aquatic organisms.
- **Strong shoulders**: More relevant to terrestrial animals, not aquatic adaptations.
- **Streamlined body**: This is a characteristic of fish and other aquatic organisms, allowing them to swim efficiently in water.

6. **Conclusion**:
- The correct answer is **streamlined body**, as it is a clear example of a natatorial adaptation that helps aquatic organisms move effectively in their environment.