Figure 21-31 The figure shows two indifference curves and two budget constraints for a consumer named Kevin. 
-Refer to Figure 21-31. For Kevin, are sweaters and shirts substitutes, complements, or neither?
Definitions:
Vulnerable
Susceptible to physical or emotional attack or harm.
Developing Nervous System
The growth and maturation process of the nervous system, which includes the formation of neural connections and refinement of neural pathways.
Teratogens
Agents or factors that can cause malformation or harm to an embryo or fetus during prenatal development.
Below-Average Intelligence
A level of intellectual functioning that is significantly lower than the average for a person's age group.
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