Which passage from the u. s. constitution reflects the principle of checks and balances?

The correct answer is Every Bill which shall have passed the House of Representatives and the Senate, shall, before it become a Law, be presented to the President of the United States; If he approve he shall sign it, but if not he shall return it. This passage shows that the legislature and executive have different roles

i think it's a)sparta

julius caesar turned the roman republic into the roman empire by coming in and taking the "dictator" role during the time of a civil war (elites vs lower classes) winning battles and reputation, then declaring him dictator for life

hope this : )