Answer:
The correct answer is Democritus.
Explanation:
Democritus, a Greek philosopher, and scientist in 440 B. C. proposed the theory of the atom. Democritus made his theory of atoms depend on the work of previous philosophers according to different scientists.
His explanation of the atom begins a stone cut in half gives two halves. If stone again and again continuously cut, at some point the stone becomes so small that it could no longer be cut, that atoms present separately from each other.
Thus, the correct answer is Democritus.