What is the best definition of "research"? investigating a subject in order to discover or revise facts, theories, and applications looking up facts in a textbook to fill out a worksheet managing conflicting information discoursing with writers and scholars in a particular field

Research is a scientific method of systematic investigation of scientific theories and hypothesis. Research involves defining a hypothesis, gathering data and information, making experiments in order to prove or not to prove the hypothesis. Its purpose is discovery, interpretation, or the research and development (R&D) of methods and systems for the advancement of human knowledge. So, from the given option the one that best describes research is: Research is investigating a subject in order to sidover or revise facts, theories and applications.