Explanation:

- Genitor: This term refers to the biological father. It denotes a man who has fathered a child, focusing on the biological or genetic connection rather than social responsibilities.

- Pator: This term indeed refers to a social father. A "pator" is a man who fulfills the role and responsibilities of a father in a social or cultural context, rather than being the biological parent.

- Godfather: This is a person chosen to guide a child in spiritual or religious matters and may also play a supportive role in the child's life. It tends more towards mentorship rather than parental responsibility.

- Genitrix: This term is used to denote the biological mother. It is the female counterpart to genitor, focusing on the genetic or biological connection.

Answer: 2 - Pator