Next paragraph: "Quantum mechanics is a fundamental theory in physics that has revolutionized our understanding of the physical world." Proper noun here is "Quantum mechanics". "Fundamental" → "basic|core|essential". "Revolutionized" → "transformed|redefined|changed". "Understanding" → "comprehension|grasp|knowledge".
"Quantum mechanics" is a proper noun, so it stays. quantum mechanics aruldhas pdf
"and unlock" – "and unlock, and decipher, and unravel" Next paragraph: "Quantum mechanics is a fundamental theory