One advantage of sexual reproduction over asexual reproduction is that it helps species to survive over long evolutionary time. This is because sexual reproduction produces :

Sexual reproduction provides a significant evolutionary advantage by generating genetic variation among offspring. Unlike asexual reproduction, which typically produces genetically identical clones, sexual reproduction involves the fusion of gametes from two parents through meiosis and fertilization.

• Genetic Recombination: During meiosis, processes like "crossing over" and independent assortment of chromosomes create unique genetic combinations.
• Adaptability: This variation ensures that individuals within a population possess diverse traits. If environmental conditions change or a new disease emerges, some individuals are more likely to have variations that allow them to survive and reproduce.
• Natural Selection: These favorable traits are passed to future generations, driving evolutionary adaptation and ensuring the species' survival over long periods.

Thus, Option D is correct because genetic diversity is the primary mechanism that allows species to adapt to shifting ecological niches and environmental stresses.