Answer:
1. The most compelling grievance as evidence that the King is a tyrant is Grievance 3. This grievance states that the King has dissolved the representative houses repeatedly for opposing his invasions on the rights of the people. This aspect of the King's actions shows his disregard for the voice and representation of the people, indicating a tyrannical behavior.
2. The choice of Grievance 3 is supported by the fact that the King has repeatedly dissolved the representative houses when they oppose his actions. This demonstrates a pattern of suppressing dissent and disregarding the democratic process. By undermining the power and authority of the representative houses, the King is exerting his own will without regard for the concerns and rights of the people.
3. Our current system of government protects us from this abuse through the principle of checks and balances. The legislative, executive, and judicial branches of government serve as separate entities with different powers and responsibilities. This division of power prevents any one branch, including the executive branch led by the President, from unilaterally dissolving the representative houses or undermining the democratic process. Additionally, the Constitution and the rule of law provide a framework that limits the powers of the government and ensures that it operates within the boundaries set by the people. This protects us from the abuse of power by any individual or entity, including the President, and upholds the principles of democracy and representation.