Answer
The iron has the greater buoyant force.
Work Step by Step
The magnitude of the buoyant force is the weight of the displaced liquid. The fully submerged iron piece displaces more liquid than the partially-submerged wooden piece.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.