Question 1: Do you confirm that the 2 girls are the same girl ? true or false
Question 2: How do you know that the 2 girls are the same girl ? Write as much details as possible
The brain is a giant pattern-matching machine. For someone famous like the person in this photo, many of us have seen her with different facial expressions (e.g., frowning vs. smiling) and from different angles, allowing us to recognize her in completely different photos.
However, there are people who look similar to each other, who could be biologically related or unrelated, and it's often difficult to tell them apart.
As with all pattern recognition, its accuracy improves proportional to the amount of observable/observed data. For example, that's why parents of identical twins can tell their children apart: due to subtle differences that the rest of us won't be able to detect without seeing them a lot more.
Different focal-length lenses can distort perspective.
A long telephoto lens will compress features, while a wide-angle lens will exaggerate features.
An 80-135mm lens in the 35mm format is best for portraiture as it looks most natural to our eyes.