1. What's the difference between a progress bar and an activity indicator?
   1. A progress bar is determinate whereas a progress indicator is used to indicate an indeterminate amount of time.
   2. There is no difference. A progress bar and a progress indicator are actually the same thing.
   3. A progress bar renders a horizontal bar—everything else is considered a progress indicator.
2. Does the React Native ActivityIndicator component work the same on iOS and Android?
   1. No, this component is not platform agnostic.
   2. Yes, this component is platform agnostic.
3. How can you use the ProgressViewIOS and the ProgressBarAndroid components in a platform agnostic way?
   1. You can define your own ProgressBar component that imports other components with platform-specific file extensions.
   2. You can't; you have to implement platform-checking logic everywhere that you want to use a progress bar.