An individual creates a(n)after he observes events​

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.

Why did david smith burnish the surface of his work cubi xix?

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?