What is the preface or introduction to a book?

a page at the front of a book that lists units and chapters with their page numbers
an alphabetical list of all the specialized words and terms used in the book and their definitions
a statement of the author’s purpose in writing the book, which may include suggestions for using the book
an alphabetical list of all topics covered in the book and the pages on which they can be found

Which excerpt from “the girl who silenced the world for five minutes” supports suzuki’s argument that she is “losing [her] future”? coming here today, i have no hidden agenda. losing my future is not like losing an election or a few points on the stock market. and now we hear about animals and plants going extinct every day – vanishing forever. i'm only a child, yet i know we are all in this together and should act as one single world towards one single goal.

Read the excerpt from it's our world, too! : young people who are making a difference.the author’s purpose in this excerpt is to

The empire state building was constructed by one hundred workers