Final answer:
Super-relatedness through haplodiploidy alone does not explain eusociality due to additional factors like ecological pressures, behavioral adaptations, and the observation that not all haplodiploid species develop eusocial behaviors.
Step-by-step explanation:
Haplodiploidy alone cannot fully explain eusociality because there are many factors at play in the development of highly social behaviors, beyond genetic relatedness. In eusocial societies like bees, wasps, and ants, sterile workers care for the queen and her offspring due to their close genetic relationships, which increases their inclusive fitness. This process is known as kin selection. However, other factors such as ecological pressures, behavioral adaptations, and environmental stability also contribute to the evolution of eusocial behaviors. Additionally, if super-relatedness were the sole driving force, eusociality would be more widespread across haplodiploid species, which is not the case.