You would not capitalize slavery unless it is part of a proper noun phrase. For example:
In the book, Slavery of Our Sons, the main character reflected on his father's influences in abolishing slavery.
Unless it is at the beginning of a sentence, then it is not capitalised.
No, maison is not capitalised in French except if it is the beginning of the sentence.
"Leap year" is not typically capitalized, unless it is used at the beginning of a sentence or in a title. It is written as "leap year" when referring to the extra day added to the calendar every four years.
No, assault does not need to be capitalised.
The D at the start will be capitalised, because it starts a sentence, and Red River is a proper noun, so it needs to be capitalised: "Do you live north or south of the Red River?"
If "algebra 1 is a title or the beginning of a sentence, then it should be capitalised. If it is in a sentence, but not at the beginning, then it should not be capitalised.
Unless it is at the beginning of a sentence, then it is not capitalised.
No it does not have to be capitalised.
No, only if it is at the beginning of a sentence.
Because in English, the nominative form of the singular first-person pronoun, "I", is normally capitalised. While "a" is not a first-person pronoun and is therefore not capitalised.
No, maison is not capitalised in French except if it is the beginning of the sentence.
No, the word autism is not capitalised in a sentence. It should only be capitalised at the beginning of sentences and when it forms part of a title. (e.g. the title of a research paper).
Yes, Egyptian is capitalised.
No, didgeridoo doesn't need to be capitalised.
Acronyms and their full versions are normally capitalised, so CNA should be capitalised and Certified Nursing Assistant should have each first letter capitalised.
Only if they are at the start of a sentence. Otherwise they are not capitalised.
Frightened is only capitalised if it begins a sentence, or is part of a title.