The figure given below shows a shift in the production-possibility curve of a country from AB to AC. Here, S1 and C1 are the initial production and consumption points respectively. S2 and C2, on the other hand, are the final production and consumption points respectively. Which of the following is illustrated by this figure? 
Definitions:
Homology
The existence of shared ancestry between a pair of structures, or genes, in different species.
Reversal
The act of changing direction, position, or an earlier decision, often used in various contexts including behavior, decision-making, and physical movements.
Linnaean Categories
Hierarchical levels of classification in biology developed by Carl Linnaeus, including kingdom, phylum, class, order, family, genus, and species.
Hierarchical
Describing a system or organization in which people or groups are ranked one above the other according to status or authority.
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