Answer:
A system of government in which the head of government is elected by and accountable to the legislature is called a parliamentary system of government.
Step-by-step explanation:
In a parliamentary system, the head of government (often called the Prime Minister) is typically the leader of the political party or coalition that holds the majority of seats in the legislature (parliament). The Prime Minister is accountable to the legislature and can be removed from office through a vote of no confidence or a similar parliamentary procedure. This system is in contrast to a presidential system, where the head of government (the President) is elected separately from the legislature and is not directly accountable to it.