What is the motivation behind Napoleon’s actions in this excerpt?

his wish to destroy the plans of the hens and ducks to ruin the chalk marks
his natural instinct to try to mark the shed and the windmill plans as his own
his feelings of contempt and animosity toward Snowball and his ideas
his desire to keep Snowball’s windmill plans hidden from the other animals

The motivation behind Napoleon's actions in this excerpt is his desire to keep Snowball's windmill plans hidden from the other animals.