State governments must follow which type of laws? local federal regional judicial

  Federal.

Explanation:

  It is known as the Supremacy Clause in the United States Constitution (Article VI, clause 2), it states that in a conflict between federal and state laws, the federal is the one that set the outcome.

  A federal law outline the minimum protections or requirements needed and the state laws adapted those to its own population.

  I hope this answer helps you.

aristocracy, timocracy, oligarchy, democracy, theocracy and tyranny

explanation:

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.