Who chooses leader in a parliamentary government?

In a parliamentary government, the leader, often referred to as the prime minister, is typically chosen by the majority party or coalition in the parliament. After elections, the head of state, such as a monarch or president, formally appoints the prime minister, who is usually the leader of the party that has secured the most seats. The prime minister's authority is dependent on maintaining the confidence of the parliament, which can lead to their removal through a vote of no confidence.