Final answer:
The domain of a relation represents the set of all possible input values. Both options a) and b) provide valid domains for the relation.
Step-by-step explanation:
The domain represents the set of all possible input values for a relation or function. In option a), the domain is {0, 1, 3, 4}. In option b), the domain is (-2, 0, 1, 2, 3). Both sets of values in options a) and b) are valid domains as they contain all the input values for the relation.