What is the author's purpose for a mystery book?

What is the author's purpose for a story about the first day of school?

What is the author's purpose for an article about why the Chicago Bulls are the best basketball team?

What is the author's purpose for a cookbook with recipes for cooking?

What is the author's purpose for an article explaining why it is important to read every day for 20 minutes?

What is the author's purpose for the passage below?

Oaks are some of the best trees for the yard. They grow very large, so they give lots of shade. That is especially good in the summer. Oak trees also can live more than 200 years, so they give shade for a long time.

What is the author's purpose for the passage below?

re you tired of sitting around the house, bored and lonely? You should join a sport like baseball! Baseball is a great team sport to play. It will give you exercise and you’ll spend time with other kids. You can compete and learn more about the sport! Maybe you’re the next Babe Ruth!

What is the author's purpose for the passage below?

Once upon a time, there was a boy named Jack. Jack and his family were very poor. One day, Jack’s mom told him to go out and sell his beloved cow. Jack walked and walked and eventually he got tired! He met a woman in the forest, and she told him that if he gave her his cow, she would give him 5 magic beans! Jack, being tired, accepted and headed back on his way home.

How many pieces of text evidence do you need to prove your author's purpose?