Communication includes talking and writing, but also includes sending and blank messages.

• A. Receiving
• B. Singing
• C. Mailing
• D. Transmitting

Answer: (A)

Communication is a two-way process: sending information and receiving it. Along with talking and writing, the missing part is receiving messages, because understanding what was sent only happens when the recipient receives and decodes it. The other options don’t fit because singing isn’t a standard part of how information is exchanged, mailing is just one method of sending, and transmitting focuses on sending rather than the full send-and-receive cycle.