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Electricity powered home and factories. how did electricity change americans' lives

Read this excerpt from leah missbach day's foreword to wheels of change.bicycles have long played a role in my life. as a young woman, i rode one year-round before i had a car. but it was later in adulthood that the bicycle became more than a source of transportation for me. the bicycle actually began to truly shape the way i saw the world.what is the author's purpose for including this in the foreword?

Reread lines 6-7 "the survivor." determine how the tone of these differs from the preceding lines (1-5)