To determine the role of an Ombudsman:
1. An Ombudsman is an official appointed to investigate complaints made by individuals against public authorities, ensuring accountability and redressal.
2. This role is common in many countries, including India (e.g., Lokpal), to address grievances.
3. The other options do not define the Ombudsman's primary function.
Therefore, the correct answer is (1) Who looks into the complaints against public authorities.