The tendency of these people, wherein 10 of them are psychology majors and all of them believing that they will become psychologists, to make predictions about one's life so self-assuredly is called overconfidence.
Being overconfident may have its own pros and cons depending on the situation this behavior used in.
I'm not sure of the exact word you are looking for, but the general idea is that the federal law will always reign supreme if there is ever a conflict between the federal and state laws. Federal law is superior or higher-ranking or more preferable, etc.
Here is the exact phrasing from Article VI of the US Constitution: "This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding."
Answer:
Indigenous peoples were able to use livestock and plows brought from Europe to farm the land more efficiently.
