who was the first person to suggest the existence of atoms?\no dalton\no democritus\no proust\no thomson\ndone

Brief Explanations:

Democritus, a Greek philosopher in ancient times, first proposed the existence of atoms. He thought matter was composed of tiny, indivisible particles called atoms. Dalton is known for modern - atomic theory, Proust for the law of definite proportions, and Thomson for the discovery of the electron.

Answer:

B. Democritus