Concept:Analyzing family relations from a given statement.Explanation:• The speaker (a man) says to a woman: "His mother is the only daughter of your father."• "His" refers to the man in the photograph.• "Your father" is the woman's father.• The only daughter of the woman's father must be the woman herself (since she is a daughter and the only one).• Therefore, "His mother" equals the woman.• So, the woman is the mother of the man in the photograph.Answer:Mother