Answer:
for a geographer and a scale is the heart of the map". justify the statement.
Spontaneous recovery means the reappearance of a previous extinguished response. For instance, Jon is scared of dogs because he thinks they look angry. After a long treatment, he finally gets used to play with the dogs. He is no longer afraid of dogs. However, one day he saw a dog walking towards him, he suddenly started to fear again. His fear was extinguished after the treatment, but he suddenly recovered that response again. This is more of an one time event.
It’s A: a positive or negative environmental stimulus that motivates behavior
It is marginal cost. <span>the marginal cost is the cost of making one more, and the marginal benefit is the price received from selling one more.</span>