C. Nutrients that strengthen bones and teeth, help keep blood healthy and keep the heart and other organs working properly
Answer:An infection transmitted through sexual contact, caused by bacteria, viruses, or parasites
Explanation:
The answer to this question is positive reinforcement.
There are two types of reinforcements: positive and negative. While the definition of positive reinforcement is given in the question, negative reinforcement occurs <u>when the behavior increases because an aversive stimulus is removed. </u> Reinforcements are the basic concepts that govern the principles of <em>operant conditioning</em>, which was researched by Skinner.