A/an attribution is made when we blame an individual's behavior on the situation;
a/n attribution is made when we blame the individual's behavior to his or her personality or other personal characteristics.

External

Internal

Explanation:

In psychology, an external attribution refers to the phenomenon by which we think that situational factors are the cause of an individual's behavior. In other words, we blame it on the situation.

On the other hand, an internal attribution refers to the phenomenon by which we think that personal factors are the cause of an individual's behavior. In other words, we blame it on the individual's personality or other personal characteristics.

answer; utilitarian;

answer; ///attempts to change more than once behavior at the same time;