What are 3 events that can lead up to speciation?

1. Geographic isolation: This is the most common way that speciation occurs. When a population of a species becomes geographically isolated from the main population, it will eventually begin to evolve independently. This can happen as a result of various factors, such as the formation of a mountain range, the flooding of a river, or the splitting of a continent.

2. Reproductive isolation: This occurs when two populations of the same species are no longer able to interbreed. This can be due to a number of factors, such as a difference in mating rituals, a difference in the structure of their reproductive organs, or a difference in the timing of their reproductive cycles.

3. Natural selection: This is the process by which organisms that are better adapted to their environment are more likely to survive and reproduce. Over time, this can lead to the development of new species, as the organisms in a population become more and more different from each other.

These are just a few of the many events that can lead up to speciation. In reality, the process of speciation is often a complex and multifaceted one.