Which of the following types of natural selection results to form a higher and narrower peak after the selection process ?

Options

A. Stabilising Selection
B. Directional Selection
C. Balancing Selection
D. Disruptive Selection

Answer

To solve the question regarding which type of natural selection results in a higher and narrower peak after the selection process, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Natural Selection**: Natural selection is a process where organisms better adapted to their environment tend to survive and produce more offspring. This leads to changes in the traits of a population over time.

2. **Identify Types of Natural Selection**:
- **Stabilizing Selection**: This type favors the average or intermediate phenotypes and reduces variation. It results in a higher and narrower peak in the distribution of traits.
- **Directional Selection**: This type favors one extreme phenotype over others, causing the peak to shift in one direction.
- **Disruptive Selection**: This type favors both extreme phenotypes, leading to the formation of two peaks (bimodal distribution) and does not support the intermediate phenotype.
- **Balancing Selection**: This maintains genetic diversity in a population, but it does not specifically lead to a higher and narrower peak.

3. **Analyze the Effects of Each Type**:
- In **stabilizing selection**, the intermediate traits are favored, leading to a reduction in extremes and a more concentrated distribution of traits, hence a higher and narrower peak.
- In **directional selection**, the peak shifts towards one extreme, which does not result in a higher and narrower peak.
- In **disruptive selection**, two peaks are formed, which contradicts the idea of a single higher and narrower peak.
- **Balancing selection** does not specifically create a higher and narrower peak either.

4. **Conclusion**: Based on the analysis, the type of natural selection that results in a higher and narrower peak is **Stabilizing Selection**.

### Final Answer:
**Stabilizing Selection**

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