Answer: A) Communication
Explanation: VOIP(Voice over internet protocol) is the protocol that helps in communication with the help of internet service .The data packets containing voice is send over the network with the help of internet protocol(IP) from sender to receiver.
Other options are incorrect because graphic/multimedia consist of various communication medium rather than just one,home/personal/education areas and business/productivity is considered as the field of the business organization which are not for established for communication.
Thus,the correct option is option(A)