In the scientific hierarchy of evidence, the term that has the greatest amount of evidence supporting it is theory.
A scientific theory is a well-substantiated explanation of an aspect of the natural world, based on a body of evidence that has been repeatedly tested and confirmed through observation and experimentation. In contrast, laws describe phenomena but do not explain why they occur, hypotheses are initial educated guesses, and conclusions are derived from specific data or experiments.
Therefore, among the options you've provided, theory has the greatest amount of evidence supporting it.