What is the difference between a Law, Theory, and Hypothesis. Which of these is the most important to a scientist and why?

A hypothesis is a supposition based on data or information that is trying to explain something.

A theory is an explication for something that is scientifically accepted.

Every law is a universally accepted knowledge that is checked by, for example, a math formula.

All scientific knowledge is not permanent, can change if someone demonstrates it's wrong.

A hypothesis is the most important of this, is the start of scientific knowledge.