When is the best time to respond to criticism

Sarah and juan were running in the school track meet. the muscles in their arms and legs them run fast. other muscles that you cannot see were also at work. the most important muscles for this track meet were the muscles in their a) arms. b) eye. c) feet. d) heart.

How do these cultures use the element of shape in very similar ways

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