Answer:
• The poem written for Napoleon and a portrait of Napoleon painted by Squealer.
Step-by-step explanation:
George Orwell's "Animal Farm" is an allegorical novel about a group of animals and their desire to be self-governed. The fictional fable focuses on the animals at "Animal Farm" and their revolt against the human masters.
The walls of the barn at the farm had an inscription of the Seven Commandments that regulates the 'law' on the farm. The wall also has the slogan "Four legs good, two legs bad" in bigger letters. Moreover, a poem written by Maximus about Napoleon and his portrait painted by Squealer is added to the wall.
Thus, the correct answer is the third option.