What is the author's purpose?

Look for the action that the author wants from the reader- does the author ask you to, think, or believe something? What is it? Does the author want you to buy something? To send money?

In this article, the author's main purpose comes early. The goal of the article seems to be to convince you to stop eating meat. What comments are made to identify this purpose?

Does the author have another purpose?

How does the author close the article? With a request? A challenge?