Final answer:
Scholars interpret features of Stonehenge like astronomical alignments, ritualistic significance, and sophisticated construction methods, but not the presence of extraterrestrial materials, which is not a valid consideration. so, option a is the correct answer.
Step-by-step explanation:
Among the issues that scholars use to build interpretations of Stonehenge, the presence of extraterrestrial materials on site is not considered valid. Instead, scholars focus on aspects like a. Astronomical alignments, b. Ritualistic or religious significance, and c. Construction methods and technology. The immense effort to build Stonehenge suggests it was created by a society with significant organization and resources, indicating strong levels of social structure and authority.
Its astronomical alignments suggest it may have been used as a rudimentary calendar, while the presence of human remains points to potential ritualistic or funerary purposes. The drystone technology used indicates that Neolithic societies had sophisticated knowledge of construction techniques, despite the lack of modern tools and equipment.