Final answer:
An air conditioning unit with a higher energy efficiency ratio (EER) is more energy efficient.
Step-by-step explanation:
An air conditioning unit with a higher energy efficiency ratio (EER) is more energy efficient.
The EER is a measure of how much cooling or heating an air conditioner can provide per unit of energy it consumes.
A higher EER means that the air conditioner is able to provide more cooling or heating for the same amount of energy input, making it more cost-effective and environmentally friendly.