Anyone wanna talk on pad/let?

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

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. drag each phase of mitosis to the correct description.

Like many art movements, pop art was created as