Madeleine allows herself $100 per month for purchasing coffee.The diagram below illustrates the choices available to her in each month. 
FIGURE 1-3
-Refer to Figure 1-3.If Madeleine chooses to allocate all $100 to buying lattes,we can say that her opportunity cost in one month is
Definitions:
Ethological Theory
A theory in psychology that emphasizes the genetic and evolutionary basis of behavior, particularly how behavior enhances survival and reproduction.
Attachment
A lasting emotional tie between two individuals.
Biologically Driven
Actions or processes influenced primarily by genetic, neurological, or physiological factors rather than environmental ones.
Survival
The ability to continue living or existing despite challenging or life-threatening conditions.
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