Answer:
The correct answer is Stimulus control intervention.
Step-by-step explanation:
Stimulus control is a concept of behavioral psychology that refers to the way an organism behaves when in the presence of a certain stimulus and how that behavior changes in its absence.
A discriminative stimulus is a stimulus that modifies the organism's behavior in this particular manner.
In this particular case, to reduce the temptation to buy and consume the snacks, Grayson starts shopping at a local farmer's market and subscribes to a healthy-eating blog. Grayson is aboiding the stimulus that causes him to elicit the behavior of eating sugary snacks.
In conclusion, Grayson's behavior demonstrates principles of a Stimulus control intervention.