Short Answer-The author's purpose in writing the article is to Inform the reader about dangers to pets in a home and how to prevent danger.
Proof-It must be informative since they don't recognize a counter arrangement if they did that would be persuasive. It's not telling a story there's not a series of events arising that must be solved by a character. You can tell it's informative because it is trying to tell you something as the reader about a problem in the world.
so basically there are 3 types Informative,Persuasive, and entertaining. persuasive is trying to convince you of something informative is trying to tell you something entertaining is telling a story.