Final answer:
The set {4, 4, 4, 4} contains only one unique element since a set is a collection of distinct objects and repetitions are not counted.
Step-by-step explanation:
The question asks about the number of elements in the set {4, 4, 4, 4}. In mathematics, a set is defined as a collection of distinct objects. Therefore, repeated occurrences of the same element are not counted multiple times. The set {4, 4, 4, 4} contains just one unique element, which is the number 4.