Ablueprint that defines the behavior of types, methods, and events is

A class is sort of blueprint from which all objects can be created, it explains a group of objects, along with describing the object data type. Fields, properties, methods, and events on a class are collective, can also be called as template or set of instructions. It contains all the data items contained in a group in a way of possible values and operations.

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.