Females induce plants to form protective galls. Before then, vulnerable to predation. First offspring are soldiers with jaws and spiny legs. In this case, the soldiers are clones of the mother produced asexually through parthenogenesis. Not all eusocial insects are haplo-diploid.
Termites are diploid, yet are just as eusocial.
Weird ring chromosomes that may make higher than expected coefficients of relatedness, but answer more likely to be found in ecology. A. Limited opportunities for Dispersal B. Defendable space and ability to defend it. In other words, by cooperating, they can increase chance of survival. A. Naked mole rats. One of seven species.