Answer:
Color: Red- This represents the danger that farm is now facing from the failure it is experiencing, and because of Napoleon's horrible ruling.
Symbol: Death- A lot of the hens on the farm are dying because they have been deprived of their rations.
Image: A revolt- The Hens in this chapter don't want to give up their eggs, so they protest against it.
I hope this helps, and that it is what you are looking for!