La rama de la física que estudia el comportamiento de los materiales con la electricidad logrando crear el chip que se utiliza en radios, televisores, celulares,
computadores, etc.
b) Termodinámica
a) Mecánica
c) Electrónica
O d) Electromagnetismo
O e) Física Nuclear

answer; i believe its called ; checks   and balances;

its b i googled it wish u luck

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.