1) Mountains are formed through various geological processes, including tectonic plate movements, volcanic activity, and erosion.

2) The banking industry is regulated by government agencies to ensure the stability and integrity of the financial system and to protect consumers.

3) The first commercially successful video game was "Pong," released in 1972 by Atari.

4) 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.