What was adam smith economic theory called and three elements of the economic theory?

Laissez-faire philosophies, such as minimizing the role of government intervention and taxation in the free markets, and the idea that an "invisible hand" guides supply and demand are among the key ideas Smith's writing is responsible for promoting.

the three major economic theories (laissez-faire, Keynesian economics, monetarism)

where is the passage

i cant solve it without knowing the passage

i believe it is the second one.   if correct plz mark brainliest.