What do learning theorists call the presentation of a stimulus that increases or maintains a response?

Learning theorists call the presentation of a stimulus that increases or maintains a response as positive reinforcement. It contains the addition of reinforcing stimulus after a behavior that makes it more likely that the behavior will occur again in the future. When a satisfactory outcome, event or reward occurs after an action, that particular answer or behavior will be strengthened such as a child receiving a gold star for doing a core.