Final answer:
The preference for mirror-image photographs of their faces by most people is best explained by the mere exposure effect.
This correct answer is 3)
Step-by-step explanation:
The preference for mirror-image photographs of their faces by most people is best explained by the mere exposure effect.
The mere exposure effect is a psychological phenomenon where people develop a preference for things that they are more familiar with or have been exposed to frequently.
In the case of mirror-image photographs, people are accustomed to seeing themselves in the mirror, which makes mirror-image photographs appear more familiar and hence more preferable.
This correct answer is 3)