The statement that best represents an abstraction used by an Internet of Things (IoT) technology is:
A smart thermostat controls the temperature of the house by allowing the user to see all data and control all systems.
This is because the smart thermostat abstracts the complexity of temperature regulation and system control by presenting data to the user in an understandable way and allowing interaction with multiple connected systems. The other options involve specific functionalities or data points but do not encapsulate the broader concept of user interaction and control over interconnected systems.