How can a reader determine the meaning of a poem?

by thinking about the pronouns used
or
by determining the tone
or
by choosing a point-of-view
or
by evaluating the rhyme scheme

or

by analyzing the imagery and symbols used
or
by considering the overall structure and form of the poem
or
by researching the historical or cultural context in which the poem was written
or
by exploring the themes and messages conveyed in the poem.