1) Banks play a vital role in the economy by facilitating the flow of funds between savers and borrowers, providing loans, and offering various financial services.

2) The Amazon rainforest produces more than 20% of the world's oxygen.

3) Cricket, originating in England, is a popular sport played in many countries and is known for its distinctive rules and terminology.

4) The world's oldest university, Al-Qarawiyyin, was founded in 859 AD and is located in Fez, Morocco.