Explanation:

- An agreement that limits an individual's freedom to marry the person of their choice is fundamentally against public policy. Such agreements undermine fundamental rights and personal freedoms.

- Option 1: Lawful

- This option implies the agreement is legal and acceptable.

- Agreements that restrict marriage freedoms are generally not lawful as they oppose basic rights.

- Option 2: Illegal

- Illegal means the agreement is explicitly prohibited by law.

- While such agreements are frowned upon, they aren't always outright illegal, just unenforceable.

- Option 3: Void

- This option means the agreement has no legal effect.

- Agreements limiting marriage choices are traditionally considered void because they are against public policy.

- Option 4: Enforceable

- Enforceable suggests the agreement can be legally upheld.

- Such agreements aren't enforceable due to their conflict with personal freedoms.