There are several methods of village formation...
The first mode is the flight mode... a group flees a given jurisdiction into the wilderness... finds a spot far enough away to not be readily pursued. This type tends to settle either deep forest or marginal terrains.
the second mode is the "move closer to work" mode... a village grows big enough that the fields are too far for a comfortable walk to do the needed work, so some working the distant fields get permission to build homes on the far side of those fields. further fields then grow from that as others move. This is also the origin mode of many railway towns - as the railways moved to connect cities, people moved to the areas to provide services to the workers, and farms generally popped up around those, and became self-supporting within a year...
the third mode is directed growth; a leader sends a group of families "out there" to expand his influence.
the fourth is exiles, where a group of criminals goes out beyond the borders because they are barred from return. This is often as far as they can practically go before becoming too weak to build.
the fifth is penal colonies. Similar to directed growth, but often intentionally send to remote and marginal land, and often ill prepared.
the sixth mode is that of castaways. Unlike many of the others, the land is usually the best within a couple days of the site of the crash, as opposed to being either remote or marginal.
Locations need 3 things: potable water, food sources, and shelter.
Shelter can be quite variable. Woods or scrub provide wood for buildings. Deserts often have caves, but tents are also doable, as are rock-huts... the prairies provided sod. Even woven grass has been used to make shelters. (Woven matts, rolled, can provide decent structural material.) Even in the arctic, whalebones and seal skins have been used to make shelters.
The Chicken. Because you have to be, to reproduce.
The egg - chickens are relatively young compared to the biology of laying eggs. By half a billion years or more.