Answer:
head of government: The chief officer of the executive branch of a government, often presiding over a cabinet; usually called Prime Minister (in a parliamentary system) or President (in a presidential system).
commander-in-chief: is the person exercising supreme command authority of a nation’s military forces; in the US, this person is the president.
Political Party Leader: The president is largely responsible for dictating the legislative agenda of his political party.
Explanation:
