How can you figure out who is real father and mother by pictures and no name?

To determine who a child's biological parents might be using only pictures, you can analyze physical features such as eye color, facial structure, and hair type, as these traits are often inherited. Additionally, look for similarities in expressions or mannerisms captured in the photos. Genetic testing or a DNA analysis would provide a definitive answer, but without names or additional context, visual comparisons remain a primary method.