Final answer:
James I argued that kings are God's representatives on Earth and should not be challenged.
Step-by-step explanation:
In his speech to Parliament in 1609, James I was making the argument that kings are God's representatives on Earth and should not be challenged. He believed in the divine right of kings, which meant that he believed that kings derived their power and authority directly from God, and therefore, they should not be questioned or opposed. This argument supported the idea that the monarch's authority was absolute and not subject to any limitations or interference from Parliament.