Final answer:
Positive emotions are associated with more activity in the left hemisphere of the brain.
Step-by-step explanation:
The question you're asking pertains to the activity of the brain regions in relation to positive emotions. According to research in the field of neuroscience, the left hemisphere of the brain has been associated with the processing of positive emotions. Gazzaniga and colleagues have identified that while both hemispheres of the brain interact to produce behaviors, some level of hemispheric dominance can be observed. Specifically, they found the left hemisphere is superior in forming associations in memory, selective attention, and positive emotions, whereas the right hemisphere is often connected with the processing of negative emotions. Therefore, the answer to the question 'Positive emotions evoke more activity on the ___ side of the brain' is a) Left.