Final answer:
This is an example of a D) Adaptive explanation. The beetles being more common in smaller fragments due to their ability to live in dry habitats is an adaptation to their environment.
Step-by-step explanation:
This is an example of a D) Adaptive explanation. The beetle species being more common in smaller fragments because they have evolved the capacity to live in dry habitats is a result of their adaptation to their environment. Adaptation refers to the process by which organisms become better suited for their habitat or environment through genetic changes over time. In this case, the beetles have developed traits that allow them to thrive in the dry conditions of smaller fragments.