Explanation:

- Option 1: Enforceable: This means the agreement can be legally upheld in court. Agreements restraining parental rights are generally not enforceable because they contradict public policy.

- Option 2: Valid: If an agreement is valid, it is legally acceptable. Agreements restricting parental rights usually aren't valid, as they disrupt the fundamental role of parenting protected by law.

- Option 3: Voidable: This means the agreement is valid but can be annulled by one party. Agreements of this nature typically aren't classified as voidable.

- Option 4: Void: A void agreement has no legal effect. Agreements restraining parental rights are void because they go against public policy and legal principles regarding family and childcare.

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