Final answer:
Enforcing mandatory energy efficiency standards is an example of a command-and-control approach to reducing electricity consumption.
Step-by-step explanation:
In the context of reducing electricity consumption, enforcing mandatory energy efficiency standards is an example of a command-and-control approach.
Command-and-control approaches involve the use of regulations and mandates to control and direct behavior.
For example, by requiring certain energy efficiency standards, authorities can ensure that electricity consumption is reduced in a specific manner.