Figure 16-8
The lines in the figures below illustrate the potential effect of entry and exit in a monopolistically competitive market on either the demand curve or the marginal cost curve of existing firms. 
-Refer to Figure 16-8. Which of the diagrams illustrates the impact of some existing firms leaving the market?
Definitions:
Excitement Phase
The initial stage in the sexual response cycle, characterized by increased muscle tension, heart rate, and blood flow to the genitals.
Ventromedial Hypothalamus
A region of the brain involved in satiety and the regulation of metabolism, playing a significant role in eating behavior.
Lateral Hypothalamus
It is the part of the hypothalamus that plays a crucial role in hunger and thirst regulation.
Amygdala
A region of the brain involved in experiencing emotions, particularly fear and pleasure.
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