The figure shows planned aggregate expenditure and output for an economy. 
Suppose that the economy starts at PAE2. What change would cause a move from PAE2 to PAE1?
Definitions:
Genetic Basis
The underlying genetic components and mechanisms that contribute to a specific trait, behavior, or condition in an organism.
Phenotypic Variation
Refers to the differences in physical appearance and physiological traits among individuals of the same species, caused by genetic and environmental factors.
Expected Frequency
The predicted count of occurrences of a particular event or trait in a population based on probability data or genetic models.
Allele
A variant form of a gene at a particular locus on a chromosome, which can result in different phenotypic traits.
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