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What builds blocks of matter?

  1. Atoms

  2. Elements

  3. Molecules

  4. Protons

The correct answer is: Atoms

Atoms are the correct answer because they are the basic building blocks of matter. Atoms are the smallest unit of an element that still retains the properties of that element. Elements are composed of one type of atom, and molecules are formed when atoms bond together. Protons are subatomic particles found within the nucleus of an atom, but they do not individually build blocks of matter like atoms do.