Final answer:
The wasp populations' divergence due to preference for different flower colors, resulting in speciation while sharing the same habitat, is an example of sympatric speciation.
Step-by-step explanation:
The scenario described involves wasp populations that were drawn to different colors of a plant's flowers, leading over time to the two populations no longer being able to interbreed. This is a classic example of sympatric speciation, which occurs when new species evolve from a single ancestral species while inhabiting the same geographic region.
In this case, the speciation is driven by sexual selection and habitat differentiation, where the two populations of wasps develop preferences for different flower colors, causing them to mate exclusively within their color preference group. This reproductive isolation eventually leads to genetic divergence sufficient to prevent interbreeding, completing the speciation process.