In Explanations, you are required to demonstrate knowledge and understanding and answer questions. These are generally longer and expect you to explain how something works. Exercise genres give you opportunities to demonstrate your understanding, usually of basic skills and concepts. They are typically short, numbered responses to questions. https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_green.swf