<span>''Roaring" economy of the 20s meant that investors could make wildly high returns on their investment in relatively small amounts of time, especially since there was practically no government regulation of investment under the Great Depression, which began with the crash of 1929. </span>
No, almost nothing is inevitable in history
Hello. You did not enter the text to which this question refers, which makes it very difficult to answer it exactly. However, I will try to help you in the best possible way.
As you showed that the word "author" in line 10 was used as a proper noun, we can consider that the same word in line 4 was used in a general way and did not specify an exact person. This is because proper nouns are terms used to specify something or someone, as the question states that the word "author" was not used with the same meaning in line 4, we can consider that this is the difference.