The ruling on a woman whose husband is absent

A woman married a man, and this man traveled to another country and was absent from her for years. This woman does not know whether her husband is alive or dead. Should she divorce him or wait for him?
She has the choice. If she wishes, she may take the case to the court and request annulment, and she has the right to annul the marriage. If she wishes, she may remain in his marriage bond until his case is investigated.