Watch this video about the amazing photographer, Margaret Bourke White.   She accomplished being "first" in many categories.  What are 3? Help please

In contour drawing crossing lines is one way to indicate this

I’m a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.

How did ferren learn about engineering, if not in school? how might this have been similar to how the ancient cultures learned engineering?