Final answer:
Lyctid beetles prefer hardwood trees because they provide a suitable environment for their reproduction and survival.
Step-by-step explanation:
Lyctid beetles prefer hardwood because it provides them with a suitable environment for their reproduction and survival. Hardwood trees often have softer sapwood, which is easier for the beetles to bore into and lay their eggs. Additionally, hardwood trees contain more nutrients and cellulose, which are essential for the development of the beetle larvae.