What is the definition of street art

Spencer's blog claims that national parks are the best vacation destinations. which evidence is best for developing his claim? a personal account from a park visitor who describes positive adventures at grand canyon and yellowstone parks an interview with a travel agent who advertises cruises, eco-tours, and whitewater rafting trips a chart that compares the number of national parks in the eastern united states to that in the western states a study that proves adults who take yearly vacations have lower blood pressure than those who do not

Which does the author mean by " nature had to kindle all the fires, for man by his own effort was unable to produce a spark

Look at the sculpture above of a gustus a staff like the one he is holding symbolized in roman culture