The hunter and gather era is to the agricultural era as the Neolithic Era is to the Paleolithic Era
Neolithic Era is to the Ice Age Era
Paleolithic Era is to the Neolithic Era
Paleolithic Era is to the Ice Age Era

there are two main types of historical sources: primary sources and secondary sources. a primary source is something that originates from the past. it can be a chronicle, a piece of pottery, or even a piece of glacial ice that gives us climate data about the levels of atmospheric carbon one thousand years ago.

1st and 3rd : ) now lemme smash