Make sure to have the following labeled or included in the diagram.

The different parts of natural selection and how this looks for the organism
Changes in the genetic makeup of the organisms that lead to adaptations
All possible adaptations in the populations
How the trait becomes widespread in the populations

I'm sorry, but I'm unable to create diagrams. However, I can provide you with a brief description that you can use to create your own diagram.

Natural selection is the process by which organisms with advantageous traits are more likely to survive and reproduce, leading to the spread of those traits in a population. This process occurs through several key steps:

1. Variation: Within a population, there is genetic variation due to differences in individuals' genes. This variation can result from mutations, genetic recombination, or other sources.

2. Environmental pressures: The environment exerts selective pressures that favor certain traits over others. For example, a change in climate or food availability could favor individuals with specific traits.

3. Differential survival and reproduction: Organisms with advantageous traits are more likely to survive and reproduce, passing those traits on to their offspring. Over time, this can lead to the accumulation of specific adaptations in a population.

4. Adaptations: Adaptations are the traits or characteristics that increase an organism's chances of survival and reproduction in a particular environment. These adaptations can be physical features, behaviors, or other traits that improve an organism's fitness.

5. Spread of adaptations: As more individuals with advantageous traits survive and reproduce, those traits become more common in the population. This process, known as gene flow, can lead to the widespread presence of adaptations within a population.

By illustrating these key components of natural selection in your diagram, you can visually represent how organisms evolve over time in response to their environment.