Đáp án + Giải thích bước giải:

* Em tham khảo ^^

Nowadays, smartphone plays an important role in our life, it brings many benefits to us. First and foremost, smartphone is the most useful communication method. It can very well be used to transmit over long distances without wires. Not simply calling, texting, now it is also integrated with more features to take pictures, identify, check health, take notes... Moreover, smartphone is also a device to entertainment. You can watch entertainment, television, listen to music or play games as long as it is connected to the internet