What is the definition of commentary? Explain it in your own words

"an expression of opinions or offering of explanations explanations about an event or situation." from Oxford Languages

In my own words "A declaration of ones opinions or personal description of a situation or occurrence."

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:

they played you again smh, you should be provided with the right answers.