Because emotional regulation requires practice, maturation, and work, it is referred to as

Because emotional regulation requires practice, maturation, and work, it is referred to as: effortful Control

effortful Control is an ability to ignore the natural dominant response in order to another subdominant response.
For example, when we're furious toward someone, we may have the tendency to scream and attack that person. But, with emotional regulation, we could control our response and choose to give polite warning instead.