1) The hibiscus flower is commonly associated with tropical regions and is the national flower of several countries, including Malaysia, South Korea, and Haiti.

2) 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.

3) The first modern health insurance policy was introduced in Germany in the late 19th century.

4) The game of rugby originated at Rugby School in England and has since evolved into different versions, including Rugby Union and Rugby League.