Academic texts are formal, based on facts and evidence and always contain citations. Non-academic texts, on the other hand, are writings that are informal and dedicated to a lay audience. They are usually on general topics and use casual or colloquial language, and may contain the writer's personal opinions.
The correct answer to this open question is the following.
Unfortunately, you did not attach the Cell Phones article, neither the cells to place the answers. Without that information is so difficult to help you.
However, trying to help you, we did some deep research and found the following. Hope it helps.
A mobile telephone or cellular telephone (commonly, (1) MOBILE PHONE or cell phone) is a long-range, portable electronic (2) DEVICE used for mobile communication. In addition to the standard voice function of a telephone, current mobile phones can provide many additional (3) SERVICES such as SMS for text (4)MESSAGING, e-mail, packet switching for access to the Internet and MMS for (5) SENDING and receiving photos and (6) VIDEOS.
A mobile phone is more than just a phone for most teenagers: it’s also a (7) MP3 PLAYER and a camera. Text messaging is (8) CHEAPER and more private so they use it a lot more than phoning.
