1) The eye of a cyclone is a region of calm, relatively clear skies and light winds at the center of the storm.

2) The push for gender equality and women's empowerment has gained momentum worldwide, with increased advocacy for equal rights, representation in leadership positions, and efforts to address issues such as gender-based violence and discrimination.

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

4) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.