What does the term chiaroscuro mean

Which of the following is evidence that the body is a wonderful mystery?

The purpose of antitrust law is to support efforts of companies to take over others discourage competition in certain markets force similar companies to combine into one protect competition by preventing monopolies

Ishmael wants to go on vacation with his friend's family. what's the best way he can persuade his parents to say yes? a he can tell them that he will be sad and stay in bed if he can't go. b he can explain that the vacation will be educational and safe. c he can say that he'll hate his parents if they don't let him go. d he can ask them for the money that he needs for the trip.