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

2) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.

3) Cyclones are fueled by warm ocean waters and atmospheric conditions that allow the formation of thunderstorms.

4) The global push for COVID-19 vaccination campaigns has been a significant focus, with the development and distribution of vaccines to combat the spread of the virus and protect public health.