The author's purpose in this excerpt is to include facts and details about what it takes to bring people together. Create a suspenseful moment that prompts readers' emotions. Encourage readers to do something about what they believe in. Describe to readers an environment where people work together.

Hello. This question is incomplete. The full question is:

"Read the excerpt from It's Our World, Too!: Young People Who Are Making a Difference. At 10:30, students from all grades packed themselves into the lab. Andy stood up and reported what was happening, then read his letter aloud and asked for suggestions to improve it. There were a few. Then he asked for, and got, the students' unanimous approval to have it read at halftime. The author’s purpose in this excerpt is to include facts and details about what it takes to bring people together. create a suspenseful moment that prompts readers’ emotions. encourage readers to do something about what they believe in. describe to readers an environment where people work together. "

Encourage readers to do something about what they believe in.

Explanation:

In the text provided above, we can see that Andy wanted his letter to be chosen to be read during the break. This was something she wanted very much, but she knew that to achieve this goal she had to write something very good, with no flaws and that would please the students. For that reason, she ran through her goals, read her letter to the students and asked them how she could improve that letter. Each student then gave his suggestion and Andy got a letter that represented everyone, making sure that his letter was chosen.

In this excerpt the author shows how Andy did something that she believed to be the best. The author hopes that readers, when reading this excerpt, will be encouraged to do something they believe in, just like Andy.