Secondary reinforcers are learned or conditioned. An example of a secondary reinforcer is grades or money. Secondary reinforcers are learned and are reinforced by the continual use of the reinforcer. Primary reinforcers are biological and include food, drink, and pleasurable activities.
Answer:
posttraumatic stress disorder.
Explanation:
The posttraumatic stress disorder which is popularly known as PTSD is a kind of disorder that occur when someone is unable to to regain his or her sense back because of the bad or traumatic experience that person has witnessed before.
This is the same case with the mayor, the mayor of Springfield has probably witnessed the terrible car accident involving 25 cars that all caught on fire twenty years ago and the mayor has not recovered from the traumatic experience.
The symptoms of posttraumatic stress disorder includes flashback, fear, self-destructive behaviour, nightmares, agitation and many more.
It can be treated by using psychotherapies and through the use of medications.
The speed drill allowed more seeds to be fertilized and also removed any dirt or harmful minerals in the soil in order to increase plant Growth
