Which poet was married to Ted Hughes?

Sylvia Plath was married to Ted Hughes, making her the correct answer. Plath was an influential American poet known for her confessional style and emotionally charged poetry, which often explored themes of identity, mental health, and personal struggle. Her marriage to Hughes brought together two prominent literary figures, and their relationship greatly impacted both of their works.

Hughes, also a notable poet, often drew inspiration from his relationship with Plath, particularly after her tragic death. The dynamics of their marriage and its subsequent effects on their poetry have been the subject of much literary analysis. This deep connection between their lives and works makes Plath the key figure related to Ted Hughes. Other options like John Greenleaf Whittier, Oliver Wendell Holmes (Sr.), and Ralph Waldo Emerson, while significant poets in their own right, did not share personal relationships with Hughes that would connect them in this context. Their lack of association with Hughes highlights why Plath stands out as the answer to this question.