Why is ivan iv called ivan the terrible?

Ivan the Terrible and his son Ivan on Friday, 16 November 1581 better known as Ivan the Terrible killing his son. hope this helps plz mark me down as brainliest

explanation:

select the correct answer from each drop-down menu.

different sources are aimed at different audiences. sometimes a source can be directed at more than a single group of usually aimed at the general population across the globe. some sources may have a very specific audience. be specifically aimed at students or scholars with a background in literature.

but whats the question? ?

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