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Explanation :

Intelligent Search and Siri- Intelligent Search is an excellent mechanism to learn user habits and act on that information- open apps before we need them, make recommendations on places we might like and guide us through our daily lives to make sure we’re where we need to be at the right time.Siri is a personal assistant to the users, able to create contextual reminders and search through photos and videos in new ways. Swiping right from the home screen also brings up a new screen that houses “Siri Suggestions,” putting favorite contacts and apps right on your fingertips, along with nearby restaurant and location information and important news. Deeper search capabilities can show results like sports scores, videos, and content from third-party apps, and you can even do simple conversions and calculations using the search tools on your iPhone or iPad. Many of the built-in apps have been updated.✓ Notes includes new checklists and sketching features✓ Maps now offers transit directions✓ Mail allows for file attachments✓ Apple Pay is being improved with the addition of store credit cards and loyalty cards✓ Leading “Passbook” to be renamed to “Wallet” in iOS 9. San Francisco font, wireless CarPlay support An optional iCloud Drive app, built-in two-factor authentication and optional longer passwords for better security. Performance improvements