I guess Readers Digest
cause I too read it, here in India.
D. Phrases such as "didn't laugh" and "heads down" convey sadness toward the farmers being driven from their land.
Answer:
The cause of writers blocks can many different things, from anxiety, depression, pressure, a sense of failing those are you. This causes your brain to go into over time and you begin to over think everything you are doing.
Explanation:
One of the richest men in the world is the appositive.
It has a comma that separates it from the rest of the sentence and the sentence makes sense without it as "Bill Gates started Microsoft."
If Bill Gates had a comma after it, it would be the apositive and the sentence would be "One of the richest men in the world started Microsoft," but since there is only one comma the appositve is "One of the richest men in the world."