Buying short contributed to the rise of stock market prices throughout much of the 1920s because the practice allowed many people to buy stocks with very little of their own money.

im not sure about this one

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: