Respond to one of the following in a minimum of 175 words: 

Share at least one real-world example of the following types of data relationships:

1:1

1:M

M:N (many-to-many)

Your example can be from work, school, a hobby, or daily life.

Discuss why you think making the distinction between these types of relationships is important for database designers. How does each of these types of relationships affect the complexity of storing and retrieving data? How do database architects apply the concepts of primary and foreign keys to each type of data relationship?