What are the key components and differences between formal and informal letters in Yoruba, focusing on address and date placement?

Section A: Objective Questions 20. Ohun akoko ti alaroko onileta aigbagbefe gbodo ko ni (a) adiresi. Explanation: The first thing written in an informal letter is typically the sender's address.* 21. Leta aigbagbefe yato si leta gbefe nitori pe o (a) ni adiresi meji. Explanation: Formal letters (leta gbefe) typically include both the sender's and recipient's addresses, while informal letters (leta aigbagbefe) usually do not have two distinct addresses in the same structured way.* 22. Ona meloo ni deeti maa n wa ninu leta aigbagbefe