Answers and Explanations:
"Uncle Dominic", "Magna Carta", "English", and "King John I" are all proper nouns. This means that they are specific names of items, so they must be capitalized.
- Uncle Dominic is the specific name of a person
- Magna Carta is the specific name of a very important historical document
- English is the specific name for the people living in Britain
- King John I is a specific name of a king
However, "power" is just a general, common noun, so it should be lowercase.
Hope this helps!