1) The process of impeachment involves charging a public official, such as a president or high-ranking government official, with misconduct and potentially removing them from office through a trial and vote by the legislature.

2) The Olympic Games, originating in ancient Greece, were revived in 1896 and are now held every four years, bringing together athletes from around the world.

3) The sport of golf originated in Scotland and is played on courses with 18 holes, each with a designated par score.

4) Mountains are important water sources, as they capture and store precipitation, feeding rivers and supporting ecosystems downstream.