Variables can be useful because they hold a certain number/data value that can easily be accessed and changed. For example, in a game, a players score is a variable that changes as the player gets more points; ie coins, items, etc.
Answer:
Log in to iCloud.com on a browser
Explanation:
On your browser which should be a supported browser, you should log in to iCloud.com since iCloud is not supported on mac OS X earlier than mac OS X Lion 10.7.5
