<em>When writing a physical or functional description, it is best to organize details </em><em>spatially</em><em>.</em>
Explanation:
There are several patterns of organization that help the writer or speaker organize the information. The <u>spatial pattern of organization</u> arranges information according to their physical location and where one element exists in relation to another. When writing a physical or functional description, it is best to organize details by using this method, meaning organize the details spatially.
In each case Carnegie is referring to the accumulation and unequal distribution of wealth, which have “revolutionized” human life for the good (“highly beneficial”).