In the US, the head of the executive branch is the Presitent of the United States. (answer D).
The president is supported in his (so far, maybe in the future: hers) tasks by the vice-president, the Cabinet (the head of the executive departments) and by departments and Institutes,
Churchill was an effective leader and statesman because of his tremendous ability to inspire people; his unique strategic insight; his relentless passion; and his imperturbable personality.
It regulates power between the branches of government so if u wanna say that congress wants to pass a law thats unconstitutional the judical branch steps in and tells them you cant do this
