Analyze The author begins by referring to the destruction of the World Trade
Center towers that occurred on September 11,2001. What specific ideas does
the author introduce to tie the events of September 11th to the scientific study
of complex systems? Why might the author have decided to explain a scientific
concept using a reference to a historic event?

Langston hughes cited walt whitman as one of his greatest influences and some believe that hughes wrote "i, too, sing america" in response to whitman's "i hear america singing." using on whitman's poem. consider aspects such as structure, there, word, choice, etc., as you craft your response. your response will be scored on how well you: -demonstrate your understanding of the ideas of the text -use evidence from the text to develop and support your ideas -organize your response in a logical manner -demonstrate an appropriate writing style through the use of precise word choice and varied sentences -use standard conventions for writing

Why didn't van gogh knock on breton's door? it seemed imposing and a bit scary. it looked alarmingly middle-class. he couldn't find the door. he saw a book that he liked instead.

Which sentence is the most effective in stating the overall purpose of section 4, “confidentiality of user names and passwords? ”