Concept:The internet is a global network of connected computers used to exchange digital information.
Explanation:The internet connects many electronic devices, such as computers and mobile phones.
Its main purpose is to allow users to send and receive electronic messages, including emails and instant messages.
This electronic communication is faster and more flexible than traditional telegrams or text messages alone.
While long-distance communication is possible through the internet, its defining function is sending electronic messages.
Therefore, the best option is the one that identifies this core use.
Answer:A. Sending electronic message