Answer:
At first glance, the author, Jackson Kuhl makes it very clear of his purpose; his purpose is meant to be an informative one. Considering that the title right away is telling us that it is going to be informative of "Innovations That Changed Building Design." We can only really assume he is going to teach us about important innovations to building designs, and or architecture, and of course its positive effect it had on that subject. He uses many images and illustrations to clarify his ideas, so that way there isn't any gray area where we may be confused. He also bolded and or set apart various technical terms to make it easier for us to notice and not miss them. This is easier and clearer to the reader, on different points Jackson Kuhl the author is bringing out. Overall, the entire article follows the rhetorical strategy of extended definition as it defines and provides examples of these innovations. When done reading this article, everybody should have read the same thing and got out the something. This is a very straightforward article, and the way it is presented makes it easy to understand, it serves its purpose. That purpose is being informative of "Innovations That Changed Building Design."
Step-by-step explanation:
(I expanded on what Ayaanxx brought and made it into 200 words)