The Black Death or plague hit Europe not long after the fall of Rome.
So a social group is a group of people that share similar characteristics. And they are important because it gets you to interact with peers. The last question is one you have to answer on your own so I play baseball and I am a Highschooler so therefore two Social Groups for me would be Baseball, and Highschool
I hope this helps :)
You just accomplished a goal and rewarded yourself with a delicious treat. the pleasant feelings that result from these behaviors are made possible by the release of dopamine.
An action or act is the action and range of actions performed by an individual, organism, system, or man-made entity in a particular environment. These systems include not only the inanimate physical environment, but also other systems and organisms.
Behavior is how a person behaves. It's what people do to make a difference, change something, or maintain the status quo. Behavior is a reaction to what happens: inside - thoughts and feelings. External - the environment, including other people.
The definition of behavior is the way a person or thing behaves or reacts. A child throwing a tantrum is an example of bad behavior. The chimpanzee behavior studied by scientists is an example of behavior.
Learn more about behaviors here:brainly.com/question/1741474
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