please help me to understand these question

1. Describe some typical pairs of entities that might be common in business, and describe their relationships, whether many-to-many, one-to-many, many-to-one, or one-to-one. Explain why that a particular relationship applies to that pair of entities.

2.Why organizing data into tables and relationships is a good way to design a database? How do related tables improve the accuracy of data in a database?