Answer:
Similarity: For transverse waves, the waves move in perpendicular direction to the source of vibration. For longitudinal waves, the waves move in parallel direction to the source of vibration . They are similar in the sense that energy is transferred in the form of waves.
Differences: In a longitudinal wave, the medium or the channel moves in the same direction with respect to the wave. In a transverse wave will the medium or the channel moves perpendicular to the direction of the wave. Here, the particles move up and down as the waves move horizontally.
Explanation:
Brazil is a Portuguese speaking country while Bolivia and Paraguay are Spanish speaking countries.
The sleeping speaker is compared to a stone on the riverbed; both lie still. The image of being in water is reinforced by these words elsewhere in the poem: "floated"; "rose and fell, as if in water."
I pretty sure it was a system to deliver messages.
