Question: How does the author achieve his purpose?

The big bend

by using descriptive phrases to explain difficult ideas

Explanation:

The Big bend can be described as a proposed skyscraper which is to be constructed in New York City. The proposal is most known for its distinctive U-shape, which would make it the longest building in the world, though not the tallest, if it were built. The Big Bend is a curved, 4,000 foot-long skyscraper planned on Manhattan's Billionaire's Row. Although the author uses descriptive phrases to explain the ideas behind the big bend however, it is very unlikely that the project will ever be built.