Which text feature gives information about what avoid when join the phone

There is a specific mechanism through which each operating system performs its basic task and functions, while having the very unique way to operate in the systems are required to be very human friendly and efficient in nature. As, they are required to operate in a more human friendly way in order to keep things in a more coordinated way of operations. For any computer or processor that is fixed inside a given system requires to have a more specific way of operations in order to deal with the specific set of data and information present inside the very unique sequence and shape, as they can bring great amount of convenience and efficiency to the daily life of any individual using the smart phone or any gadget that involves the technological efforts of human beings. For example, we can analyze the system present inside the smartphone or any high speed computer that involves a large and complex form of data inside it. While, there is a system present for the controlling or operating the volume or sound increase and decrease of the multimedia or audio files present in the system. And it also includes the inbuilt function for the convenience and for a greater user interference.

The correct answer is a