To explain the printing press Gutenberg invented and why he invented it.
Explanation:
The passage begins with describing the situation which led to Gutenberg inventing the printing press. With the growth of literacy game the need for a faster and inexpensive way to produce written documents. The passage then goes on to explain the printing press Gutenberg invented and how it functions.
In “Letter from Birmingham Jail” Martin Luther King Jr. structures his ideas strategically as he uses symbolism and rhetorical questions to persuade his readers to help put an end to segregation.