It seems that the correct answer is a) Passage 1 explains his central idea, while passage 2 supports it. In Of the Wisdom of the Ancients, Francis Bacon tries to give the 32-Greco-Roman-legends a new interpretation. In fact, in passage one he established the central idea of the text:
• “the natural motion of the atom; which is indeed the original and unique force that constitutes and fashions all things out of matter.”
With these lines, he states that the center of everything is the atom; it is what constitutes and defines the identity of thing/human beings.
While in passage 2 he reinforces this idea by mentioning:
• “whereas the primary seeds of things, or atoms, are minute and remain in perpetual infancy.”
Therefore, Bacon comments that although this character gained more attributes as he becomes older, his essence (seed/atom) will last forever.