Answer:
A is correct.
Explanation:
It is about human behavior.
Answer:
In a paragraph
Explanation:
A mobile phone is a voice communication device that is not permanently attached to a telephone network by a physical connection. It uses radio signals to connect to another device to provide the connection to a telephone network. Various radio protocols are used such as DECT, WI-FI, Bluetooth, GSM, GPS, etc.
second one.......................ig
