Answer:
The correct answer would be the spinal cord.
The reflex action can be defined as an immediate or involuntary response of the body to the external stimuli primarily done to protect itself from immediate harm.
The spinal cord is the main structure which controls the reflex actions.
Reflex actions are needed to be quick due to which the signals are first sent to the posterior horn of the spinal cord where the reflex arc is formed. rather than to the brain for processing.
