Answer: The answer is Neural Coding.
Step-by-step explanation:
Neural Coding tries to characterize the relationship between an stimulus and neuronal responses from the individual, and the behavior of said neurons in a specific neural ensemble. (Electric Activity).
Neural Coding explains that sensory information is represented in the brain by neurons and the networks of them.
In this case, different processing of faces cause different neurons to fire, which supports the theory of Neural Coding.