'Habitation' related words and the slight usage nuances between them
1) What do you call the people living activity somewhere:
P.S I think ‘a’ doesn't work here and the only word for this concept in English language which can be used in both written and spoken English is ‘habitation’; though it sounds a bit stilted and scientific. If so, is there any word which can be used instead which is more neutral? Also, for me 'dwelling' is too formal and a legal term which is used very rarely in everyday English.
2) What do you call the place where someone lives:
Added: for me the only choice which is correct here is ‘a’; as far as I’m concerned ‘b’ is used only for animals and plants; although it is too scientific and if one uses it in everyday conversations and for an individual, it would sound odd and unnatural.
3) What do you call a place where is suitable for people to live in:
a) residable place
b) habitable place
c) inhabitable place
added: I guess ‘a’ doesn't exist in English vocabulary at all, and both ‘b’ and ‘c’ work in this sense.
4) What do you call a place where is ‘not’ suitable for people to live in:
a) unresidable place
b) uninhabitable place
Added: in my view, the only usable word in this sense could be ‘b’; for me ‘a’ is incorrect.