In contract law, what is NOT a requirement for consideration to be enforceable?

In contract law, consideration is a crucial element needed to form an enforceable contract. The essence of consideration is that it involves something of value exchanged between the parties. However, it is important to note that consideration does not have to be monetary in nature. This is why the choice indicating that consideration must be monetary is not a requirement; non-monetary forms of consideration such as goods, services, or even a promise can suffice.

Valid consideration can also include a legal detriment to the promisee or a benefit to the promisor, meaning that the act or forbearance must be something that the parties have agreed to and which the law recognizes as valuable. Additionally, consideration must be legal and intentional, ensuring that whatever the parties agree upon does not contravene established laws and that there is a clear intention from both parties to create a binding agreement.

Thus, the assertion that consideration must be monetary is fundamentally incorrect within the broader context of contract law, making it the right choice in this question.