The correct statements about the artworks of Lewis Hine and Charles Sheeler are:
- They are examples of documentary photography or Precisionism.
- They depict American industrial sites and powerful machines.
Both Lewis Hine and Charles Sheeler focused on American industry, with Hine's work often emphasizing social issues through documentary photography, while Sheeler’s work is known for its Precisionist style, highlighting the beauty and form of industrial architecture and machinery.