PLS HELP!
Which of the following is an example of an essential question?

A. How many gallons of water are in the Pacific Ocean?
B. Did the ancient Romans eat pasta?
C. How does photosynthesis produce oxygen?
D. What is happiness?

It is true that prior to 1914 the united states often had been disturbed by events in other continents. we had even engaged in two wars with european nations and in a number of undeclared wars in the west indies, in the mediterranean and in the pacific for the maintenance of american rights and for the principles of peaceful commerce. but in no case had a serious threat been raised against our national safety or our continued independence. what is the theme of this excerpt? a. the responsibility for americans to avoid involvement in war.b. america’s history of international involvement.c. a new kind of threat to american security.d. america’s history as a peaceful nation.

Select the contred text in the passage which sentence in this excerpt from john galsworthy's narrative essay "gone" reflects his view that there is no afterlife? an old woman and mrs. herd's sister were in the sitting-room, they showed us to the crazy, narrow stairway. though we lived distant but four hundred yards of a crows flight, we had never seen mrs. herd before, for that is the way of things in this land of minding one's own business a slight dark girlish-looking woman, almost quite refined away, and with those eyes of the dying, where the spirit is coming through, as it only does when it knows that al is over except just the passing. she lay in a double bed with clean white sheets. a white-washed room, so low that the ceiling almost touched our heads, some flowers in a bow, the small lattice window open. though it was hot in there, it was better far than the rooms of most families in towns, living on a wage of twice as much, for here was no sign of defeat in decency or cleanliness. in her face, as in poor herd's, was that same strange minging of resigned despair and almost eager appeal, so terrible to disappoint. yet, trying not to disappoint it, one felt guilty of treachery: what was the good, the kindness in making this poor bird flutter still with hope against the bars, when fast prison had so surely closed in round her? but what else could we do? we could not give her those glib assurances that naive souls make so easily to others concerning their after state. and the night was so beautiful, so utterly glamourously beautiful, with its star-flowers, and its silence and its trees clothed in moonlight. all was tranquil as a dream of sleep. but it was long before our hearts wandering with poor herd, would let us remember that she had slipped away into so beautiful a dream

What is the independent cause in this sentence? "if the poem is about going mad when love is lost, what would happen if love didn't die? "