Which of these sentences contains a subordinate clause?

In the section the deciding pitch what is the narrators point of view on how th pitcher feels about the upcoming event

London includes a quote about john thornton as he is observing hal attempt to motivate the exhausted dogs "it was idle, he knew, to get between a fool and his folly". if the word "idle" is defined as "of no real worth, importance, or significance", what does this statement mean with regard to hal? who is the fool? what is hal's folly? why would john thornton think it of no real worth or useless to intervene?

What are the similarities of physical and chemical change ?