Which word set completes the following analogy?
librarian : books : :
rescue : emergency
scientist : microscope
horse : blacksmith
farmer : agriculture

librarian : book :: scientist: microscope

As I see it, the librarian's profession is comprised of books. Like a librarian uses books to do her job. Whereas, a scientist does his job with the help of microscopes.

1- cleans/ tidies up

2- were

3-would be

4- had known

5-takes

6-must be/ have to be/should be

our founding fathers introduced the revolutionary idea that each person's desire to pursue their idea of happiness was not self-indulgence, but a necessary driver of a prosperous society. they created a government to defend that right for everyone.