What is a key function of the core OS layer in iOS?

The core OS layer in iOS is fundamental because it primarily handles hardware abstraction and system resources. This layer serves as the backbone of the operating system, managing essential tasks such as memory management, file systems, and driver interfaces for hardware components. By abstracting hardware details, it allows applications to operate without needing to interact directly with the hardware, promoting efficiency and enhancing security.

This function is pivotal for the overall performance and stability of the iOS environment. It ensures that applications can utilize system resources effectively, providing a stable and predictable operating environment while enabling hardware compatibility across a range of devices. This centralized management of system resources helps in optimizing performance, prolonging battery life, and maintaining the integrity of the system.

While the other options mention important aspects of the iOS operating system—such as user interface management, multimedia services, and internet connectivity—they operate on higher layers built on top of the core OS layer, that depend on the foundational support that it provides.