When cleaning her closet, Nadia finds her 20-year-old wedding photo album. As she flips through the pictures, she starts to cry joyful tears. Seeing the photos and rekindling the emotions of her wedding day most likely activated her

a. thalamus.
b. medial temporal lobe.
c. amygdala.
d. prefrontal cortex.

C. Amygdala

Explanation:

The amygdala is one of two almond-shaped nuclei clusters in complex vertebrates, found deep and medium within the temporal lobes of the brain, the amygdalae function independently of the limbic system.

The amygdala is a processing device that is connected from our senses and our internal organs to receive incoming messages. Specific emotional responses are strongly involved, it is responsible for the perception of emotions such as anger, fear, and sadness, as well as the controlling of aggression.

Nadia Seeing the photos of her during her younger age rekindling the emotions of her wedding day most likely activated her Amygdala, which made her to cry joyfully.

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.