Late one night you are leaving the science building during a snowstorm. as you approach your car, your right foot suddenly slips on a patch of ice. your left leg immediately stiffens as you try to regain your balance. the reflex action you relied upon is a(n)

contralateral reflex

Explanation:

Contralateral reflex -

It is the type of reflex action , where the flexors in the withdrawing limb contracts and the extensors relax , and the opposite case in the other limb, leads to contralateral reflex.

This reflex action occurs when someone steps on any object like nail, ice , etc .  

Hence, from the question, the reflex action depicted in the question , when the person stepped on ice, is the contralateral reflex.  

if im not mistaken its a. collective emotional arousal