Among the given choices, fertilization is the closest answer. Generally, fertilization occurs when the nucleus both reproductive cells called gametes from a male and a female combines. And the result of the fertilization is the combination of the chromosomes from the male and the female.
Hypomagnesemia is a condition of low magnesium levels in the body and because magnesium acts as an active cardiovascular electrolyte, its deficiency leads to cardiac complications such as dysrhythmias.
People who suffer from myocardial infarction are often treated for hypomagnesemia to improve their cardiac conduction, however, hypomagnesemia can also develop in chronic alcoholics.
The other reasons that could lead to the condition faced by Robert Stevens can be hypokalaemia however, as he is also chronic alcoholic hypomagnesemia is the main cause.