Inspection of the following table of correlation coefficients for variables in a multiple regression analysis reveals that the first independent variable that will be entered into the regression model by the forward selection procedure will be ___. 
Definitions:
Sympathetic Nervous System
A part of the autonomic nervous system that activates the body's responses under stress, preparing for the 'fight or flight' response.
Coronary Heart Disease
A condition where the heart's blood vessels, arteries, become damaged or diseased, leading to a reduction of blood flow to the heart muscle.
Hostility
Intense anger or aggression towards someone or something, often without a clear reason.
Blood Pressure
The force exerted by circulating blood on the walls of blood vessels, critical for maintaining the body's circulatory function.
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