Translation:The boy calls for his father and he saves him from the animals.
I have answered "The boy calls for his father and saves him from the animals." Which was accounted as wrong, since the "he" was missing. Should this really be a mistake?
Yes, because the subject changes. The 'han' that is used is referring to the boy's father. In the sentence you wrote, you are implying that the boy saves the father from the animals, which is not the case.
Of course, that makes a lot more sense, thank you. For some reason I had a scenario in my head, where the boy warns the father about some animals and therefore saves his father.