1) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.

2) The word "book" contains two vowels: O and O.

3) The speed of light is approximately 299,792,458 meters per second.

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.