What is the best tool to use when distinguishing between two words that have similar denotative meanings?

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

Marvell's poem is in fact an argument consisting of three logically related points. in at least 150 words, identify each point and trace the speaker's argument from proposition to conclusion. you may find it to identify the transitional word or phrase that marks the beginning of each part of the argument. support your analysis of the argument with details from the poem.

Which statement is most clearly objective?