Which of the following elementary steps is involved in the mechanism of the reaction shown below? 
Definitions:
Predictive Validity
The extent to which a score on a scale or test predicts future performance on a related task or outcome.
Language-Fostering Games
Games designed to enhance language development, including skills in vocabulary, grammar, and communication.
DNA Profiling
A forensic technique used to identify individuals by characteristics of their DNA, often used in criminal investigations and paternity testing.
Heritability Estimates
Statistical measures that describe how much genetic factors contribute to individual differences in a particular trait or behavior in a population.
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