Which of the following pairs reflects a relationship to addiction? a. medulla oblongata—craving b. cerebellum—reward c. hippocampus—craving d. nucleus accumbens—reward

The correct pair is -'d' that is nuclear accumbens-reward.

Explanation:

The location of nuclear accumbens is the basal region of fore brain.This is the part of basal ganglia.

This is an important part of ventral striatum along with dorsal striatum which from the basal ganglia.

The main structure of nuclear accumbens are core and shell.

The shell region is also called as NAcc shell is located in the outer region of the nuclear accumbens also called as dorsal amygdala.

The core region NAcc core is located in the inner region of the nuclear accumbens  and considered to be a part of basal ganglia.

This region control the reward and punishment centers that are present in the brain. This contain another function which is associated with psychotic problem such as depression, addiction and ablation etc.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely