What theme is emphasized in this excerpt from "ode on a grecian urn" by john keats?

heard melodies are sweet, but those unheard
are sweeter; therefore, ye soft pipes, play on;
not to the sensual ear, but, more endear'd,
pipe to the spirit ditties of no tone:
fair youth, beneath the trees, thou canst not leave
thy song, nor ever can those trees be bare;
bold lover, never, never canst thou kiss,
though winning near the goal yet, do not grieve;
she cannot fade, though thou hast not thy bliss,
for ever wilt thou love, and she be fair!

a.
only things that continually change are true.
b.
unfulfilled desires and dreams seem sweeter.
c.
incidents and events depicted in art are true.
d.
art does not last forever; only memory does.
e.
incidents and events depicted in art are untrue.

Laugh and be merry, remember, better the world with a song,    better the world with a blow in the teeth of a wrong.    laugh, for the time is brief, a thread the length of a span.    laugh and be proud to belong to the old proud pageant of man. (laugh and be merry/john masefield/public domain) which of these is the main idea of the poem?

Read the excerpts from the land. [willie] turned to my daddy. "it's my boy mitchell done this, mister edward, and i know there ain't no way t' make it up t' ya if this here horse don't heal right, but i jus' 'bout t' put a strap t' mitchell my own self 'bout what he done. i'm gonna put a strap t' him right now, matter of fact! " with that said, he positioned his whip and turned toward mitchell. *** my daddy stopped and looked at me. "no," he said. "i'm not going to whip you, paul. no, your punishment is that you'll never get to ride ghost wind again. i figure you'll remember that a whole lot longer than a whipping. you won't ride any of the other horses either, including the appaloosa, until i say so." which statement about willie’s and mister edward’s reactions is true? both men believe that their sons should be held accountable for their behavior. both men believe that their sons need to learn to handle horses properly. both men believe that their sons will likely harm the horses if they ride them. both men believe that their sons have permanently injured ghost wind

Comparing and contrasting is a form of