In which part of the human respiratory system does actual oxygen exchange take place?

What evidence could be used to support the authors'claims in this excerpt? select three options.- tweets (twitter messages) describing the overthrow ofben ali at the time it happened- verifiable facts that explain that social media haslittle effect on citizen journalism-speeches that give biographical accounts of the life andaccomplishments of mubarak-journal entries from a student describing how socialmedia him join a protest- quotations from experts on social media use duringuprisings within the arab world

4. interpret how do the speaker's descriptions of and feelings about the wind change as the poem progresses? how does this shift show a change in the tone of the poem?

This poem describes a train as if it were a horse. what literacy device does the poet use in this poem?