Yes, she is my sister.
is it a introductory phrase?

It's to know your purpose before you read something because a purpose can:

Write two paragraphs describing how your chosen theme relates to the characterization and setting in "the yellow wallpaper." one paragraph should focus on characterization, and the other should focus on setting. back up your ideas in each paragraph by summarizing the story in a way that emphasizes the most important details.

“third, all reviewers have a bias – no matter how impartial they try to be, opinions on movies are just that: opinions. this isn’t necessarily a bad thing: if you read a review by a critic that you know prefers foreign films, you know how seriously you should take his scathing critique of ironman.” according to this passage, all reviewers a. prefer foreign films c. have bias b. hated the movie ironman d. refuse to watch popular films