The influence of the technological revolution in — and — the concentration of wealth and power in the hands of the few should worry us all.

✅ কেন সঠিক: The writer is worried, so technology must be increasing the concentration of wealth and power. ‘Accelerating and intensifying’ both mean making it faster and stronger.

❌ অন্য অপশন: ‘Diminishing’, ‘undermining’, ‘neutralizing’ and ‘demolishing’ reduce the concentration, which would not worry us.

💡 মনে রাখুন: Check that both blanks point in the same direction as the tone of the sentence (here, worry = increase).