Natural selection is an important mechanism of evolution that drives changes in populations over time. It is the process by which certain traits become more or less common in a population due to their impact on survival and reproductive success. Natural selection acts on heritable variations within a population, allowing individuals with beneficial traits to survive and reproduce, while those with less advantageous traits are less likely to pass on their genes.

There are three main types of natural selection: stabilizing selection, directional selection, and disruptive selection. These different types of selection are characterized by the way they influence the distribution of traits within a population.

Stabilizing selection:
Stabilizing selection occurs when individuals with intermediate traits have a higher fitness compared to individuals with extreme traits. This type of selection reduces variation in a population and favors the average phenotype. It is often seen in stable environments where extreme traits are less advantageous.

Directional selection:
Directional selection occurs when individuals with one extreme phenotype have higher fitness compared to individuals with other phenotypes. This type of selection shifts the average phenotype in a particular direction over time. It is typically seen in environments undergoing significant change or in response to new selective pressures.

Disruptive selection:
Disruptive selection occurs when individuals with extreme phenotypes have higher fitness compared to individuals with intermediate phenotypes. This type of selection can lead to the formation of distinct subpopulations with different phenotypic traits. It is often seen in environments with diverse or fluctuating selective pressures.

Technical selection:
The term "technical selection" is not a recognized or commonly used term in the field of biology. It does not refer to a specific type of natural selection. It is possible that this term is either a misinterpretation or a term used in a different context unrelated to biology.

In conclusion, the correct answer is option 'D' because "technical selection" is not included in the recognized types of natural selection. Stabilizing selection, directional selection, and disruptive selection are the three primary types of natural selection that explain how different traits are favored or disfavored in a population based on their impact on survival and reproduction.