Kiki made all of the props for the play herself. O adjective
O adverb
O conjunction
interjection
O noun
o preposition
o pronoun
O verb

the word that best matches the meaning of the expression "went to the big ocean" is died.

the goldfish died, which is why the father looks at the children mournfully. the "big ocean" is the father's way of saying fish heaven. he could have just said that the goldfish died, but this way, the children imagine the fish in a bigger, better place instead of just picturing a dead fish.

explanation:

hm, switch the relative; nominative and indefinite; objective ? not too bright in the knowledge of the english.

i cannot see any of the options