A. Voice recognition
B. Voice telephony
C. Voice Integration
This question was addressed to me in class test.
This intriguing question originated from Communication with IOT Devices with Voice Commands in division Communicating with IoT Devices : Exploring Future User Interface of IOT
To elaborate: Voice Integration could potentially challenge the need for a touch screen on many devices, as it reduces the cost for devices that will be dormant for majority of the time.