How does this part of Lanyon’s letter help create suspense?

by mentioning that the scene is set in London
by describing a mysterious and nervous stranger
by mentioning the “pillars of the portico”
by describing someone Lanyon knows well

Which of the following is developed in a short story through conflict and plot development? character dialogue exposition setting

What type of figurative language is used in this passage from "letter from birmingham jail"? just as the prophets of the eighth century b.c. left their villages and carried their "thus saith the lord" far beyond the boundaries of their hometowns, and just as the apostle paul left his village of tarsus and carried the gospel of jesus christ to the far corners of the greco roman world, so am i compelled to carry the gospel of freedom beyond my own hometown. allusion symbolism imagery metaphor

Which is not among the style choices a writer would use, if he or she is trying to establish a formal writing style/