Correct option is D
The word that best fits the blank is
‘sites’, making the phrase “famous prehistoric sites” correct and meaningful.
• ‘Sites’ refers to locations where important activities or events have occurred, particularly in historical or archaeological contexts.
• In this context, “Maeshowe tomb” is a prehistoric archaeological site, making “sites” the correct word.
Meanings of other options:
• ‘Scenes’: Refers to views or parts of a play/movie – incorrect.
• ‘Sights’: Refers to something worth seeing, but less appropriate than ‘sites’ in historical context.
• ‘Seats’: Refers to places to sit – irrelevant here.
Hence, ‘sites’ fits the context of prehistoric locations.