What technique is ‘footprints were sunken to their shins.’

According to eric shlosser’s introduction to fast food nation what is his book primarily about?

What does the video on the wilderness downtown website incorporate to create the end product?

Which statement best reflects how martin luther king, jr. uses rhetoric and style in paragraph 9 of "letter from a birmingham jail" to assist him in advocating the use of nonviolent direct action to achieve justice for negro citizens in birmingham? click here to read the letter.