1) The insurance industry employs a wide range of professionals, including underwriters, actuaries, claims adjusters, and insurance agents.

2) The word "yesterday" contains three vowels: E, A, and A.

3) International relations encompass the study of relationships between nations, including diplomacy, treaties, and foreign policy. It examines the interactions and dynamics among different countries in the global arena.

4) Cows have best friends and can become stressed if they are separated.