How are the visual/digital arts important to various careers?

Which is a good guideline to follow when evaluating art

Describe the various work performed by multimedia artists, the creative experiences individual studio employees bring to their work, digital equipment they frequently use, as well as professional opportunities outside of a full-service multimedia studio they recommend for those just starting their careers in the field.

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