What is a simplified reprsentation of reality? It is either a model,table,variable,or an inquiry. Does anyone know the answer?

Answer 1

I found one source on the Internet that thinks its a model and that agrees with my thoughts.
http://www.systems-thinking.org/simulation/model.htm

Answer 2

using the big idea of enrgy flowing through food chains

Answer 3

blank a group of atoms held together by the energy of chemical bonds