Gold need to be mixed with other metals to make a ring? why?

Which of the following lines contains a simile? you wet brown bag of a womani think that i shall never see/ a poem lovely as a treebecause i could not stop for death/ he kindly stopped for mea little learning is a dangerous thing

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?

From the life cycle of a plastic bottle, what is the best definition for the word “toxin”?