Choose the word that best fits the blank: Because clean water is an increasingly ______ resource in the Middle East, conservation technologies are vital.

Answer and explanation

Correct answer: C. scarce

  1. Step 1: Analyze sentence logic: 'Because clean water is an increasingly [blank] resource ... conservation technologies are vital.'
  2. Step 2: Identify required meaning: The need for conservation implies that water is deficient in quantity or hard to find.
  3. Step 3: Select 'scarce', which means insufficient for the demand.
Answer
scarce.
Why not the others: 'abundant' and 'limitless' describe surplus, which would eliminate the urgency for conservation; 'superfluous' means unnecessary or more than enough.

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