What role does the executive branch play in checking the power of congress?

What is articulating thoughts and ideas effectively using oral written and non verbal skills a part of

The ideal that all people should be treated equally. a. rule of law b. representative government c. limited government the bill of rights and the declaration of rights both seek to protect a. the separation of powers b. personal liberties c. representative government

What greek scientist created a screw to move water for irrigation?