'Habitation' related words and the slight nuances between their usage

Question

'Habitation' related words and the slight usage nuances between them

1) What do you call the people living activity somewhere:

a) residence

b) habitation

c) dwelling

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:

a) residence

b) habitat

c) domicile

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.

Answer 1

1a) "He is the artist-in-residence."

1a) I reside in Seattle. (This is not as natural as "I live in Seattle", but it is legally precise.)

1a) Seattle has half a million residents.

1b) Seattle has half a million inhabitants.

1c) Half a million people dwell in Seattle.

1c) I dwell in Seattle. Peregrin Took dwelled in the Great Smials.

1c) There are two hundred thousand dwellings in Seattle. (Homes.)

2a) My residence is a nice home.

2b) The natural habitat of a computer programmer is a cave, lit only by glowing computer screens and other artificial light sources.

2c) My domicile is in Seattle. I am domiciled in Seattle. (Again, these are not as natural as "My home is in Seattle", but they are legally precise.)

3b & 3c) "Habitable place" and "Inhabitable place" are both valid phrases. A "hospitable clime" is used to describe regions.

4b) An "Uninhabitable place" is a valid phrase. "Inhospitable" is also used to describe regions.

Answer 2

1) and 2)

a) The location where you are (ex. your residence address)
b) Not usually used for people (ex. the bears' habitat)
c) The physical building or structure (ex. I live in my house)

3) b) or c). To me these sound unnatural though.

4) b) I have never heard a).