Saudi Arabia's economy is petroleum-based.
Oil accounts for 90% of the country's exports and nearly 75% of the government's revenues.
The vast majority of people live in South America in the Brazilian Highlands
Answer: Option A
<u>Explanation:</u>
The highest population in the south America is in the country of Brazil which is in huge count which is 201 million and most of the population in this country of Brazil live in the highlands of Brazil.
After Brazil, the highest population in South America is in Columbia which is only 47 million which shows that there is a huge difference in the population of most populated and the other regions of South America.
