6- Which excerpt from the selection best illustrates how point of view contributes to the development of the theme of the importance of hindsight? A-His name had reached Spain, and the king felt his authority threatened.
B-Why rant over the impaling of the Indians when Spaniards—noblemen among them—have suffered the same fate in the name of God?
C- What stupidity made him send the governor, Martín Fernández de Enciso, back to Spain?
D-Balboa imagines his body being dragged into a tree, his boots swinging from the limbs as the great cat tears his heart from his ribs.

Explanation:

If it were me, I would pick D.

The answer is very graphic. Balboa is not actually experiencing what he is thinking. He is imagining what is happening. His point of view (himself) is critical in making clear what it is that he fears.

No other answer quite delivers the same powerful message in the same way, although I think you could pick B or C.

I'll stick with D.

in june, we will have been married for eighteen months. (i am assuming this is what you want? the sentence, as you have presented it, is grammatically incorrect--   you want it corrected, yes? )

it states the claim