Which of these is a result of adaptive evolution?

Adaptive evolution refers to the process through which species undergo changes that enhance their ability to survive and reproduce in response to environmental pressures. This can lead to the development of traits that are better suited for the conditions in which the species lives, known as adaptations.

In this context, the result of adaptive evolution is an improvement in survival in changing environments. When organisms possess traits that allow them to cope better with challenges such as climate changes, resource availability, or predation, their chances of survival and reproduction increase. Over time, these advantageous traits become more common within the population, demonstrating the successful effects of natural selection.

In contrast, loss of genetic diversity would be counterproductive to adaptive evolution, as a diverse gene pool is crucial for a population's ability to adapt to new challenges. Stagnation in species development indicates a lack of progress or adaptability, which does not align with the concept of adaptive evolution. An increase in population size without environmental change does not necessarily indicate adaptive evolution, as it may occur without any significant changes to the species or their environment, particularly if the population has not developed any new advantageous traits.