1) The ozone layer, located in the Earth's stratosphere, protects us from harmful ultraviolet (UV) radiation.

2) The English alphabet has five vowels: A, E, I, O, and U.

3) The word "orange" contains three vowels: O, A, and E.

4) The FIFA World Cup is the most-watched sporting event globally, with billions of viewers tuning in for the tournament held every four years.