• The sentence describes an artefact that was admired not only for its age but also for the careful way it was preserved.
• Therefore, the blank requires a noun that means great care, precision, and attention to detail.
• "Meticulousness" means being extremely careful, thorough, and precise, making it the most suitable choice.
• The other options do not fit the context of maintaining or preserving an artefact.

Correct Sentence:

The artefact was admired not just for its antiquity but also for the meticulousness with which it was maintained.

Option Analysis:

• (a) severity → Incorrect (Means strictness or harshness, not careful maintenance.)
• (b) brevity → Incorrect (Means shortness in duration or expression.)
• (c) meticulousness → Correct (Means great care, precision, and attention to detail.)
• (d) veracity → Incorrect (Means truthfulness or accuracy.)

Correct Answer: (c) meticulousness