Using operant conditioning terms, this is an example of: b) negative reinforcement by avoidance.
Explanation:
The term negative reinforcement was coined by B. F. Skinner. The behavior or response of the person can be improved by avoiding or preventing the negative outcome.
Avoidance is the preventing measure that helps in preventing the aversive stimulus from occurring in the place.
In the above scenario, Kevin decides to go to his lawn. Kevin wants to keep himself away from the mosquito bites. So he sprays himself with the insect repellent before he starts moving to the lawn. This action of Kevin shows negative reinforcement by avoidance.