Which of the following is a true statement regarding the bostrichidae family?

The statement regarding the Bostrichidae family being true is that lead cable, bamboo, and polycaon are part of this family. The Bostrichidae family, commonly known as the horned powder-post beetles, does include diverse members that are known to infest and damage various materials, including wood. Lead cable and bamboo represent examples of materials that can be affected by these beetles due to some species within the family being wood-borers or wood-destroying insects.

In this context, the other statements do not hold true. The family indeed includes wood-destroying insects, contradicting that assertion. While some species may prefer hardwood, it is not limited to only softwood trees. Additionally, stating that there is a single species is incorrect, as the Bostrichidae family encompasses a range of species, further demonstrating the diversity within this group. Thus, recognizing the correct classification and characteristics of the Bostrichidae family affirms that option B accurately reflects their biological diversity.