What aspect distinguishes iOS from Android in terms of code base?

The distinguishing aspect that sets iOS apart from Android in terms of code base is that iOS has a closed-source code base. This means that the underlying source code for iOS is not available for public access or modification, making it exclusive to Apple and their development team. Consequently, developers working on iOS apps must adhere to strict guidelines set by Apple, and any updates or enhancements come directly from the company itself.

In contrast, Android operates with an open-source foundation, which allows for greater transparency and flexibility. Developers can modify the Android source code, customize it for various devices, and even develop their own versions of the operating system. This openness fosters a broader ecosystem where multiple manufacturers can create Android devices with varying features.

The other options do not accurately capture the core difference in the code base for iOS and Android. While some devices run on Android, they do so because it’s designed to be installed on a variety of hardware, unlike iOS, which is restricted to Apple devices. Furthermore, while there may be varying degrees of cross-platform compatibility for applications, the fundamental nature of the operating systems involves distinct philosophies—Apple striving for control with a closed ecosystem and Google encouraging openness with Android.