Countries trade with each other when, on their own, they do not have the resources, or capacity to satisfy their own needs and wants. By developing and exploiting their domestic scarce resources, countries can produce a surplus, and trade this for the resources they need. You can integrate all of this into your question. Hope this helped.
Answer:
The answer is D. Cleaning your room to avoid your roommate's nagging, is an example of a negative reinforcer.
Explanation:
In operant conditioning there are two strategies to modify behavior, through reinforcement and through punishment. Reinforcement is targeted to repeat a wanted action or behavior and punishment is used when a certain behavior wants to be eliminated; there are two types of reinforcers, positive and negative, a positive reinforcer is a pleasant stimulus that is given when the desired behavior takes place, a negative reinforcer, however, is taking away or avoiding an unpleasant stimulus as a reward when the desired behavior takes place.
In this case, you clean your room to avoid an unpleasant stimulus, that is your roommate's nagging, therefore, it is a negative reinforcer, that can take you to repeat the desired behavior, that is, cleaning your room.
<span>As commander and chief, the President and the executive branch have broad authority over the armed forces. They make strategic decisions on what operations the military takes and how they are executed. The President cannot, however, declare war. Only Congress can declare war.</span>
I believe the answer would be B, as the listed names are those of their city-states.
