Final answer:
Scientific research is distinguished by its objective, systematic approach to studying the natural world through testable theories and empirical evidence, unlike methods that incorporate supernatural elements or non-empirical sources.
Step-by-step explanation:
In the search for knowledge and truth, scientific research is characterized by its methodological approach to understanding the natural world. Option (d) by being restricted to objective studies of the natural world using testable theories, empirical data, and standard methodology and reasoning, most accurately describes how scientific research is distinguished from other fields of inquiry. This is because scientific research relies on empirical evidence and logical reasoning to create a comprehensive understanding of phenomena.
Through the processes of inductive and deductive reasoning, scientists formulate hypotheses and theories to explain their observations. These hypotheses must be falsifiable and are subject to rigorous testing. If such theories stand up to empirical testing, they are retained and refined; otherwise, they are discarded or modified. This objective and systematic approach allows science to separate fact from mere opinion or superstition, and is essential for the progress of knowledge.
By contrast, approaches that include supernatural or paranormal elements, or rely on non-empirical sources such as religious premises or supernatural hunches, are not part of scientific methodology. As such, they do not contribute to the body of knowledge built by the natural sciences, which includes fields like biology, chemistry, and physics.