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Re: Most physics textbooks are dense and abstruse, whereas
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14 Oct 2017, 15:42
Explanation
The word whereas sets up a contrast with dense and abstruse (the latter of which means “difficult to understand”), so you need a word that means something like “clarity.” Sagacity and prowess both imply skill, but you need something that also implies a kind of simplicity. Limpidity and lucidity fit the bill perfectly.
Hence options limpidity, lucidity are correct!