Deep in the Amazon jungles of Brazil is a huge, open-pit mine that is described as the largest and richest gold find of this century. Inside the pit. 40,000 workers mine the gold without the aid of modern equipment. This modern day gold rush began in 1980, when a Brazilian farmer took
some of the gold nuggets he found on his land into a nearby town. Now people from various occupations and many parts of the world work the
mine, which has already yielded more than a half-billion dollars in gold.
Which words best describe the author's purpose?