Amir is researching how fast food impacts young adults. He finds hundreds of sources on the topic and realizes he needs to revise his research plan. What’s the best way to do this? Include impacts on both children and adults. Refocus on a specific impact on young adults. Include the impacts of additional types of food. Focus on the impact of fast food on a specific adult

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?