Final answer:
In his funeral oration, Brutus blames Caesar's ambition for his assassination, believing that it threatened the Roman Republic and its values of liberty and democracy.
Step-by-step explanation:
In his funeral oration, Brutus blames Caesar's ambition for his assassination. He believes that Caesar's desire for power and dictatorial actions threatened the Roman Republic and its values of liberty and democracy. Brutus argues that by killing Caesar, they were preserving the Republic and preventing Caesar from becoming an autocrat.