Every time Erwin cried,his father would immediately pick him up and he would stop crying.Now Erwin is a real crybaby.In this case,what has his father's behaviour acted as with respect to Erwin's crying behaviour?

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The Answer of Every time Erwin cried,his father would immediately pick him up and he would stop crying.Now Erwin is a real crybaby.In this case,what has his father's behaviour acted as with respect to Erwin's crying behaviour?

Every Time Erwin Cried,his Father Would Immediately Pick Him Up